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July 28, 2014

Search: Physics - EM spectrum

Number of results: 55,109

Physics
What type of spectrum is produced by a hydrogen gas when a high potential difference is applied to it? a visible spectrum emission spectrum absorption spectrum a continuous spectrum I've been all through my notes and cant figure this one out :/
March 6, 2012 by Bunny

physics
What difference does an astronomer see between the emission spectrum of an element in a receding star and a spectrum of the same element in the lab?
May 3, 2008 by Kim

Physics
If the electron in a hydrogen atom obeyed classical mechanics instead of quantum mechanics, would it emit a continuous spectrum or a line spectrum?
April 10, 2008 by Kara

11th grade Physics
Difference between Atomic spectrum and emission spectrum. First give me the clear cut definition of both and then the difference!!!
July 24, 2010 by Akashdeep Singh

Physics - Hydrogen Emission spectrum
a) Describe the emission spectrum of a hydrogen discharge tube b) Explain why different color lines appeared in different position in the spectrum. Use a suitable atomic model to help construct your answer. c) Explain how do you decide if the lines observed are of the first ...
November 8, 2010 by Farah

Physics
A lamp fimament is made of tungsten. Why do we get a continuous spectrum rather than a tungsten line spectrum when light from an incandescent lamp is viewed with a spectroscope?
March 27, 2008 by Leigh

physics
how are the colors in a spectrum from an atom different from those in a rainbow? I think it is that the spectrum colors are more distinct and not "fuzzy" like a rainbow but I'm not sure
November 2, 2009 by josh

Physical Science Question 2
What is the electromagnetic spectrum? Give examples of each kind of wave and relate each example to its relative position in the spectrum. I will be happy to critique your thinking on this. The following 2 sites will answer all your questions. http://www.geo.mtu.edu/rs/back/...
June 20, 2006 by Liz

Chemistry
Distinguish between an absorption spectrum and an emission spectrum.with which did bohr work?
June 8, 2012 by Yeneta

science
Why is the helium spectrum have so many more lines than the hydrogen spectrum?
November 30, 2011 by hewitt

Physics - EM spectrum
Here's the question: which part of the electromagnetic spectrum has a refractive index of 1.45 in glass? I've attempted to tackle it with v = frequency x wavelength and refractive index = light speed in vacuum / light speed in material but without success... Help appreciated ...
March 4, 2007 by John

O chem
comment on suitability of running infared spectrum under the following conditions: A neat spectrum of liquid with a boiling point of 150 C is determined with salt plates. and same question but at 35 C
September 18, 2012 by MELISSA

chemstry
the most prominent line in the spectrum of an element is 267.2 in what region of the electromagnetic spectrum is this line found
March 16, 2014 by Anonymous

earth science
How does the wavelength of the infrared portion of the electromagnetic spectrum differ from that of the visible portion of the spectrum?
January 1, 2013 by Shiny

Chemistry
what is the emission spectrum of the sun and what does this spectrum reveal about the types of elements in the sun?
October 27, 2007 by Alison

Organic Chemistry
Use the data below from an electron impact mass spectrum of a pure compound to deduce its structure. Mass Spectrum M/z Relative intensity 66 32 64 100 49 26 29 72 28 83 27 60
December 5, 2012 by Anonymous

Science
Compare the size of the visible light spectrum with the size of the elctromagnectic spectrum?
October 14, 2008 by Anonymous

Organic Chemistry
I just finished an organic chemistry lab experiment on separating and analyzing an unknown acid/neutral compound mixture using extraction, recrystallization, TLC, melting point analysis, and IR spectrum. In the instructions, "Obtain an IR spectrum for each of your ...
December 6, 2010 by Kate

Physic
A lamp filament is made of tungsten. Why do we get a continuous spectrum rather than a tungsten line spectrum when light from an incandescent lamp is viewed with a spectroscope?
December 11, 2012 by shelly

Physics - Hydrogen discharge tube
a) Describe the emission spectrum of a hydrogen discharge tube b) Explain why different color lines appeared in different position in the spectrum. Use a suitable atomic model to help construct your answer. c) Explain how do you decide if the lines observed are of the first ...
November 8, 2010 by Farah

physics
what can we learn from an analysis of a stellar spectrum?
December 4, 2009 by Doly V

Physics
A transmission diffraction grating with 600 lines/mm is used to study the line spectrum of the light produced by a hydrogen discharge tube with the setup shown above. The grating is 1.0 m from the source (a hole at the center of the meter stick). An observer sees the first-...
September 16, 2011 by AfterLife

Chemistry
In hydration of of 2-Ethyl-1-Butene What important bands (include wavenumbers) would begin to disappear in an IR spectrum and what important bands would begin to appear in the IR spectrum as the reaction progressed?
November 27, 2010 by Mandy

Phsyics
How might they use spectroscopy to deter- mine the atmospheric composition of these planets? 1. None of these 2. By analyzing the spectrum of the surface of the planets. 3. All of these 4. By analyzing the molecules that compose the planets. 5. By analyzing the spectrum of the...
November 13, 2013 by Andrew

Emission Spectrum of hydrogen ...CHEM
Can someone please explain the emissiom spectrum of hydrogen? THose lines represent the energy released by the electron when going from one orbital (energy level) to a lower orbital. The difference of energy levels exactly corresponds to the energy in the light photon.
May 12, 2007 by Pet

Integrated Physics and Chemistry
The ____ motion of a star can be determined by studying its spectrum
May 10, 2011 by ashlee. :D

Chemistry
in Synthesis of para-Methylacetanilide What important bands (include chemical shifts) would begin to disappear in a H-1 NMR spectrum and what important bands would begin to appear in the H-1 NMR spectrum as the reaction progressed?
November 27, 2010 by Mandy

science
i am so confused someone please help this is a take open book test except the answer is not in the book,would a plant grown in red light do well? blue light? HELP PLEASE Think of the light spectrum from red to violet. Which has the most energy, red or violet. What does a plant...
September 18, 2006 by Patty

Physics
What observation shows that diamond has a slightly different index of refraction for each of the various colours of the spectrum?
February 15, 2011 by Susan

Physics
Help please How do the dark lines of an atom's absorption spectrum relate to the bright lines of its emission spectrum? A. The bright lines are at the same energies as the dark lines. B. The dark lines are at higher energies than the bright lines. C. The bright lines are at ...
June 10, 2014 by Me and I

Chemistry
The infrared spectrum of CH3CH2NH2 shows two absorptions not shown by bromoethane. Identify the bonds responsible for these absorptions. I'm a spectroscopist, but not a chemist. Here's my best guess. The CH3CH2NH2 has a NH2 group where a Br would be in bromoethane. The NH2 is ...
January 12, 2007 by Lyn

chem
λ for one line of the hydrogen spectrum is .4118 x 10-4 cm. Use this value in the Rydberg equation to calculate the RH value using n1 = 2, and n2 = 5. change the line spectrum to meters you know the equation is Et= Ef-Ei (i think is the equation they want you to use, i ...
October 2, 2006 by Mary

Chemistry
The energy levels of one-electron ions are given by the equation: En=(-2.18*10^(-18)J)(Z^2/n^2) The series in the He spectrum that corresponds to the set of transitions where the electron falls from a higher level to the nf = 4 state is called the Pickering series, an ...
March 24, 2013 by Anonymous

physics
in pl spectrum what is the red shift and blue shift and also give the interpretaion
November 27, 2010 by pradee

Chemistry
This is about spectrometry. How would the presence of salicylic acid affect the results of the spectrophotometric determination of the purity of ASA? Why? I don't know how you conducted the experiment but I assume you measured a peak in the absorption spectrum of ASA. Since ...
April 25, 2007 by Brissa

Chemistry
Purple light in the visible region of the electromagnetic spectrum has a shorter wavelength than does the green region of the spectrum. Which of the following can you conclude? Is it: a)a photon of purple light has a higher frequency than does a photon of green light or b) ...
November 17, 2011 by Lisa

Physics
1)Put the types of radiation of the electromagnetic spectrum in order from: a)longest to shortest wavelength b)greatest to lowest energy c)slowest to fastest speed A)radio,microwave,infrared,light,x-rays,gamma rays B)gamma-rays,infrared,light,microwave,radio I couldnt find C. ...
April 18, 2008 by Anonymous

Physics
The radio station WBRU broadcasts in the radio spectrum at 95.5 MHz. What is the wavelength of this electromagnetic wave in meters?
February 4, 2013 by Alex

chemistry
The red line in the Helium spectrum is longer than the red line in the hydrogen spectrum. What does that tell us about the distance between n2 and n3 in helium as compared with the distance between n2 and n3 in hydrogen?
November 15, 2010 by help

psy 230
In your own words, describe each of the five basic dispositional traits. Then, select one of the adjective pairs listed in the table for each of the five trait categories in Table 1.2 and describe where you think your personality falls in the spectrum of each adjective pair...
March 5, 2010 by crystal

chemistry
1. The mass spectrum can be observed for all forms: pos. ion, neg.ion, molecules, and atoms, can't it? 2. Is there a formular to calculate how many spectrum of the substances we need to observe? Please give me some examples, and calculation. 3. I knew the examples of H2S+, and...
December 29, 2009 by Bun

Chemistry
What is the wavelength of the electromagnetic radiation emitted from a hydrogen atom when the electron undergoes the transition n = 5 to n = 3?((Broken Link Removed) is a spectrum m In what region of the spectrum does the line occur? near ultraviolet far ultraviolet near ...
June 10, 2011 by Lance

Physics
The refractive index of a material is different for different wavelengths and colours of light. For most materials in the visible range of the electromagnetic spectrum, shorter wavelengths have larger refractive index compared to longer wavelengths. The effect of this on ...
March 26, 2010 by Sandra

Physics
Please help me solve this! The spectrum of the sodium atom is detected in the light from a distant galaxy. If the 590.0 nm line is redshifted to 658.5 nm, at what speed is the galaxy receding from the Earth?
August 11, 2010 by Brian

12th grade american governmet
Research Ronald Reagan especially with regards to their foreign policy and foreign involvement during their administration. Identify 3 aspects of their foreign policy or foreign events they involved the US with. for each of the events explain where on the spectrum you believe ...
December 30, 2009 by Dee

Physics
Since an absorbing gas reemits the light it absorbs, why are there dark lines in an absorption spectrum? That is why doesn't the reemitted light simply fill in the dark places?
March 27, 2008 by Leigh

Chemistry
I'm doing a flame testing lab in which I'm supposed to be able to identify an unknown element by observing the color it emits once heated. The color of the flame after heating this unknown metal is a light pinkish-violet. The question I need to answer asks what metal ion this ...
December 15, 2008 by Brianna

chemistry
The glass panels of a sky roof need to be coated in order to screen out ultraviolet radiation (10-400 nm wavelength) but without color distortion in the visible spectrum. Candidate coating materials are gallium nitride (GaN) with a band gap,Eg, of 3.2 eV, or gallium arsenide (...
December 16, 2012 by meshy

physics
The human eye is most sensitive to light having a frequency of about 5.3*10^14 Hz, which is in the yellow-green region of the electromagnetic spectrum. How many wavelengths of this light can fit across the width of your thumb, a distance of about 2.0 cm?
March 5, 2008 by rick

Physics
Q1: Find the frequency of revolution of the electron in the classical model of the hydrogen atom.In what region of the spectrum are electromagnetic waves of this frequency?? Q2:A beam of 13.o electrons is used to bombared gaseous hydrogen.What series of wavelengths will be ...
June 3, 2014 by Shah Rukh

Astronomy
What type of spectrum is sunlight?
February 18, 2014 by Barbara

science-8th
what causes an electromagnetic spectrum?
April 8, 2009 by Alexa

Chemistry
A gas in a discharge tube consists entirely of ions of the same element, of the same charge. Each ion has only one remaining electron. The voltage between the electrodes of the gas discharge tube is increased from zero. Electrons are accelerated across the potential, and then ...
March 22, 2013 by Sam Chem

physics
please give me some idea for making a working model based on optics. Like combination of light and lenses, spectrum etc......& how can i make a working model with the use of contact lenses....
June 18, 2013 by edward

physics
The ionisation potential of atomic hydrogen is 13.6 eV. A strong emission line in the spectrum of atomic hydrogen occurs at a wavelength of 121.6 nm. Deduce the initial and final values of the quantum number n for this spectral line.
May 17, 2011 by Olivia

science
what is energy,and use the electromagnetic spectrum to explain it.
October 11, 2009 by Sam

chemistry
what is energy and use the electromagnetic spectrum to explain it.
October 11, 2009 by jill

chemistry
In what region of the electromagnetic spectrum is a wavelength of 4.89×10^−15 m
October 8, 2010 by Jessie

science
what changes in an atom produce an atomic spectrum?
June 9, 2011 by harold

Chem
I have no idea What to do. What does it mean by 'draw what you think the visible range spectrum of this dye would look like.' To get the A, I used Beer's law. So I got 9.265nm for Absorbance. What should I do for the next? The question is ----Next Simon checks the ...
October 11, 2010 by Kim

space
what do the pattern of lines in a star's absorption spectrum represent?
April 30, 2009 by nhi

chemistry
For all deexcitations that result in the visible spectrum of hydrogen, what is n ?
November 15, 2010 by help

Physics
In which region of the electromagnetic spectrum do we find the energy to fully ionize hydrogen? A) Radio B) Infrared C) Visible D) Ultra-violet E) X-ray I want to know how you would go about doing this question; I know we need to find the wavelength, but what exactly is the ...
April 22, 2010 by Hannah

chem
what colored lines are expected in the atomic emission spectrum for mercury?
April 14, 2008 by natash

Organic Chemistry
How many peaks would be expected in the 1H NMR spectrum for mesitylene? A. 2 B. 6 C. 3 D. 12 E. 9
March 6, 2009 by nilee

organic chemistry
what type of feature will be observd in the ei mass spectrum of chlorobenzene?
March 25, 2013 by kay

Organic Chemistry
How do I make an IR Spectrum of C6H12S2 (Allyl Propyl Disulfide)
April 24, 2013 by Em

Chemistry
A gas in a discharge tube consists entirely of ions of the same element, of the same charge. Each ion has only one remaining electron. The voltage between the electrodes of the gas discharge tube is increased from zero. Electrons are accelerated across the potential, and then ...
March 25, 2013 by Chemq

chem
determine the wavelength of the line in the emission spectrum produced by an electron transition He+ from ni= 4 to nf= 2.
April 6, 2011 by james

CHEMISTRY
In the emission spectrum of hydrogen what is the wavelength of the light emitted by the transition fro m n = 4 to n =2.
April 13, 2011 by HELP

Astronomy 1010
What are six regions of the electromagnetic spectrum? please detail and answer
January 17, 2012 by Frank

PHYSICS- please help! i cant get my last problem
The compound eyes of bees and other insects are highly sensitive to light in the ultraviolet portion of the spectrum, specifically light with wavelengths between 300.0 nm and 400.0 nm. To what frequencies do these wavelengths correspond? (Assume that the speed of light to be 3...
May 9, 2010 by brittany

Chemistry
What are the wavelengths, in nanometers, of the bright lines of the hydrogen emission spectrum corresponding to the transition: n=5 to n=2.
October 22, 2011 by Anonymous

Chemistry
What energy is associated with a photon in the infared region of the spectrum having a frequency of 4.5*10^12s^-1
October 31, 2011 by Fred

Chemistry
How much energy is associated with a photon in the gamma ray region of the spectrum with a frequency of 6.6*10^5s^-1
October 31, 2011 by Rob

organic chemistry
Determine the structure of the compound C7H14O based on its 13C NMR spectrum.
November 2, 2011 by jennel

CHEMISTRY
What is the wavelength in meters for light having a frequency of 2.40 X 10ˆ12 sˆ-1? What portion of the electromagnetic spectrum does this belong?
September 7, 2012 by Kimberly

Science-Greenhouse Effect
What is the electromagnet spectrum? PLEASE ANSWER ASAP...I REALLY NEED HELP!!
April 23, 2013 by HS

Physics-Astronomy
Hello, I have no idea how to do the following question. Any help would be appreciated: An energy of at least 13.6 electron-volts is required to ionise a hydrogen atom. What is the longest wavelength of electromagnetic wave capable of ionising hydrogen? And which regions of the...
November 16, 2009 by Mark

chemistry
I was doing a spectroscopy problem, and on the NMR spectrum a peak at around 4.4 with 2 H says "exchanges with D2O". What does this suggest?
November 26, 2008 by lindsay

chemistry
Calulate the wavelengths (in nm) of the visible lines in the line spectrum of hydrogen using the Rydberg equation (nf = 2; ni = 3, 4, 5, and 6).
November 10, 2009 by Jim

science
What conclusion could you make for Sun emitting a continuous spectrum of radiation crossed by dark bands
September 20, 2012 by gideon

chemistry
A gas in a discharge tube consists entirely of ions of the same element, of the same charge. Each ion has only one remaining electron. The voltage between the electrodes of the gas discharge tube is increased from zero. Electrons are accelerated across the potential, and then ...
March 23, 2013 by schoolgirl

physics
What is the minumum potential that must be applied across an x-ray tube in order to observe each of the following? What is the min of the continuous spectrum in each case? (a) K line of potassium ____kV ____nm (b) K line of tin ____kV ____nm (c) L line of cesium ____kV ____nm
August 5, 2007 by --pat--

physics
The yellow line emitted by a helium discharge tube in the laboratory has a wavelength of 587 nm The same yellow line in the helium spectrum of a star has a measured wavelength of 590 nm. Calculate the speed of the moving star.
December 14, 2012 by amy

science
on light, heat and sound Waht are primary coulars of light What is spectram what are the colours What determins a colour Name one good conductor of heat and one good insulatore??? thanks if you help me send answer soon thanks a million http://csep10.phys.utk.edu/astr162/lect/...
July 25, 2005 by stephanie

Chemistry
Explain the production of an emission spectrum in terms of the energy states of an electron. what does that mean someone help me please.
November 6, 2007 by John

chemistry
which color of the visible region of the electromagnetic spectrum has the highest energy? a. red b. blue c. green d. violett
May 11, 2010 by alex

Biology
What is the difference between an action and absorption spectrum? (We're talking about photosynthesis and the colors absorbed and such)
October 2, 2011 by Anonymous

chem
calculate the wavelength of the green line in the visible spectrum of excited H atoms using Bohr Theory
November 7, 2011 by kris

Chem
Predict the values of m/z and the most abudent fragments you would observe in the mass spectrum of di-n-propyl ether?
April 2, 2013 by Anonymous

Chem
Predict the values of m/z and the most abudent fragments you would observe in the mass spectrum of di-n-propyl ether?
April 2, 2013 by Anonymous

physics
The spectrum of light from the galaxy M100 has a prominent dark line at a wavelength of 592.2 nm. The same spectral line observed in a lab on earth has a wavelength of 589.4 nm. How fast is M100 moving relative to earth? (the speed of light = 3.00 x 108ms-1)
January 29, 2010 by Mota

Astronomy
Now imagine you’re an astronomer on Earth looking at the spectrum of an object in space. In the spectrum you are looking for the so-called Lyman- alpha line of hydrogen which occurs at a wavelength of  = 122 nm. In your telescope, you observe the Lyman- alpha line at 243 nm...
October 1, 2013 by qwerty

Biology
1)Animal cells prefer to be in isotonic solution, while plant cells prefer to be in hypotonic solution. Explain what this means and why it is so. 2.) In terms of Gibbs free energy, what does “unstable” mean? Also, give at least two additional ways to say that a molecule is ...
October 24, 2012 by Alex

science(chemistry)
I have a question about solvent evaporation. If I had an organic layer and an aqueous layer in an unknown mixture of liquids and wanted to obtain the solid of a compound(s) dissolved in the layers, is it reasonable to assume that I can run the compound in the IR spectrometer (...
April 17, 2009 by ~christina~

Chemistry
An astrophysicist working at an observatory is interested in finding clouds of hydrogen in the galaxy. Usually hydrogen is detected by looking for the Balmer series of spectral lines in the visible spectrum. Unfortunately, the instrument that detects hydrogen emission spectra ...
April 24, 2014 by Anonymous

chem
Briefly explain why the transitions associated with the Lyman series correspond to wavelengths in the ultraviolet region of the electromagnetic spectrum.
April 14, 2008 by natash

SCIENCE
How do the types of electromagnetic radiation, including the colors of the visible spectrum, lineup in order of relative energy?? pleaz help
May 31, 2009 by iluv2cheer

Chemisty
Consider a hydrogen atom that goes from the n = 2 to the n = 1 state. (a) Calculate the wavelength, in nm, of the photon emitted. (b) What part of the electromagnetic spectrum is it?
September 20, 2011 by Pamela

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