Number of results: 95,196
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 ...
Sunday, March 4, 2007 at 1:44pm by John
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 :/
Tuesday, March 6, 2012 at 12:33am by Bunny
Physics-Astronomy
1) E=planck'sconstant*speedlight/wavelength solve for wavelength. 2) http://www.astro.virginia.edu/class/oconnell/astr121/im/em-op-spectrum.gif
Monday, November 16, 2009 at 10:51am by bobpursley
Organic Chemistry
How do I make an IR Spectrum of C6H12S2 (Allyl Propyl Disulfide)
Wednesday, April 24, 2013 at 8:18pm by Em
physics
The Fraunhofer lines in the solar spectrum match up with Iron's absorption spectrum.
Sunday, October 26, 2008 at 10:14am by Anonymous
physics
incandescent solids produce a continious spectrum of radistion, excited gases - line spectrum
Wednesday, May 8, 2013 at 11:02pm by Elena
physics
The lab spectrum is the same as the telescope spectrum except that the frequencies of the lines are shifted lower.
Saturday, May 3, 2008 at 10:49pm by DrBob222
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?
Saturday, May 3, 2008 at 10:49pm 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?
Thursday, April 10, 2008 at 8:59pm 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!!!
Saturday, July 24, 2010 at 2:28pm by Akashdeep Singh
physics
I agree with Elena on the brakding cuttoff. My answer ignores the continuous spectrum. So for the answer, consider this: What have you covered in your physics class: transitions from energy levels, or the "continuous" spectrum? Good work, Elena.
Saturday, June 2, 2012 at 8:10am by bobpursley
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 ...
Monday, November 8, 2010 at 7:10pm by Farah
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
Monday, November 2, 2009 at 9:17pm by josh
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?
Thursday, March 27, 2008 at 11:42pm by Leigh
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/...
Tuesday, June 20, 2006 at 10:14am by Liz
science
Why is the helium spectrum have so many more lines than the hydrogen spectrum?
Wednesday, November 30, 2011 at 7:10am by hewitt
Chemistry
Distinguish between an absorption spectrum and an emission spectrum.with which did bohr work?
Friday, June 8, 2012 at 2:53pm by Yeneta
Chemistry
if someone's got em right please post em =))))))))))))))))))
Monday, July 12, 2010 at 12:07am by Anonymous
Physics
Does blue light or orange light have a larger index of refraction? Blue light is bent more by a prism than orange light. Does blue light or orange light have a larger index of refraction in glass? A. Blue B. Orange If you know the answer to this, could you also explain why? ...
Thursday, October 29, 2009 at 11:48pm by Jeff
earth science
How does the wavelength of the infrared portion of the electromagnetic spectrum differ from that of the visible portion of the spectrum?
Tuesday, January 1, 2013 at 8:39pm by Shiny
Chemistry
The main difference is that a heated filament gives rise to a continuum while the Hg gas gives rise to a line spectrum. You don't see a line spectrum, of course, because the Hg line spectrum shines on the coating on the inside walls of the fluorescent tube and you see the ...
Tuesday, May 8, 2012 at 5:46pm by DrBob222
chemistry
Provide a alternative method for a neat spectrum of a liquid with a bioling point of 35 degress celcius using salt plates. how does the solubility of running the infrared spectrum under this?
Tuesday, September 18, 2012 at 8:27pm by renee
Chemistry
what is the emission spectrum of the sun and what does this spectrum reveal about the types of elements in the sun?
Saturday, October 27, 2007 at 12:55pm by Alison
chemistry
The problem you posted doesn't say. If the original problem (the one from which you obtained your question) doesn't say, it doesn't matter. The only difference is that the emission spectrum is a photograph (negative) of dark lines against a white background. The ...
Monday, November 9, 2009 at 8:08pm by DrBob222
Science
Compare the size of the visible light spectrum with the size of the elctromagnectic spectrum?
Tuesday, October 14, 2008 at 8:25pm by Anonymous
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
Tuesday, September 18, 2012 at 10:06pm by MELISSA
Chemistry
delta T = i*Kf*m 0.34 = i*1.86*0.1 solve for i. Then i x 0.1 = effective molality which I will call em. NaCl <==>Na^+ + Cl^-= Do an ICE chart for NaCl NaCl will be 0.1-y Na^+ will be y Cl^- will be y The sum of NaCl, Na^+, and Cl^- will be equal to em So you will...
Sunday, August 30, 2009 at 5:10pm by DrBob222
Chemistry
I like part of it. I have bolded the change I would make. Feel free to change it to your writing style if you wish. By the way, the emitted spectrum MAY be in the visible spectrum but it may also be in the ultraviolet, infrared, x-ray region, etc etc. When the electrons in the...
Tuesday, November 6, 2007 at 9:25pm by DrBob222
Writeteacher
Hi Writeteacher, would you mind looking at my question below? Thanks Em ps> thanks for all your help so far
Tuesday, August 9, 2011 at 10:08pm by Em
Law
Hi beautiful people Is there any specific way for a conclusion to be written for a Legal essay? I know the introduction and structure of points are slightly varied and I'd just like to know if there are any pointers on conclusions. Thanks a heap Em
Thursday, May 31, 2012 at 9:33pm by Em
Chemistry
calulate the molality of solution that contains 51.2g C10H10 in 500mL of CCl4. the density of CCl4 is 1.6g/mL
Wednesday, November 14, 2012 at 5:59am by EM-EM
CHEMISTRY
c = fw c = speed of light = 3E8 m/s f = frequency in Hz\ w = wavelength in m. Here is a site that will help you identify the section of electromagnetic spectrum.http://csep10.phys.utk.edu/astr162/lect/light/spectrum.html
Friday, September 7, 2012 at 8:46pm by DrBob222
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?
Tuesday, December 11, 2012 at 11:09pm by shelly
Legal Studies
Hi beautiful people Is there any specific way for a conclusion to be written for a Legal essay? I know the introduction and structure of points are slightly varied and I'd just like to know if there are any pointers on conclusions. Thanks a heap Em
Friday, June 1, 2012 at 2:22am by Em
Science
The radiation emitted by a star is to a good approximation thermal radiation. This then implies that the spectrum will be the Planck spectrum. The higher the temperature, the shorter the wavelength at which the emitted power will peak.
Monday, May 25, 2009 at 6:17am by Count Iblis
science
If you compute volume <em>vs</em> surface area, you will find that the shape with highest V/A ratio is a cube.
Wednesday, September 28, 2011 at 8:46pm by Anonymous
physics please help
F =G•m•M(E)/[R(EM) –R(M)]², where the gravitational constant G =6.67•10^-11 N•m²/kg², m =2.7 kg, Earth’s mass is M(E) = 5.97•10^24 kg, Distance between the centres of the Earth and the Moon R(EM) =384467000 m. Moon...
Friday, May 25, 2012 at 4:38pm by Elena
statistics
abc def ghi <em>jkl</em> mno
Monday, November 26, 2012 at 8:13pm by Anonymous
Modern
Zani -- I deleted your last post because it came from the same computer as Em's several posts. Go back and check the answers to Em's posts. Please do not try to fool us by using different screen names.
Tuesday, August 9, 2011 at 10:26pm by Ms. Sue
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 ...
Monday, December 6, 2010 at 12:16am by Kate
physics EM
I know its this stupid Mastering Physics site. It can word things that straightforward.
Monday, March 24, 2008 at 2:16pm by Spencer
Physics EM
Physics2212 students... lets all protest against mastering physics.
Monday, March 10, 2008 at 7:50pm by JB
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 ...
Monday, November 8, 2010 at 5:22am by Farah
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
Wednesday, December 5, 2012 at 12:35pm by Anonymous
Physics EM
hello
Thursday, March 6, 2008 at 11:32am by Anonymous
physics
its the negative of the .065
Sunday, May 1, 2011 at 9:06pm by em
Physics EM
roflcopter
Monday, March 10, 2008 at 7:50pm by Steve
physics em
nvm
Monday, March 10, 2008 at 3:12pm by Spencer
physics
Two point charges of the same magnitude but opposite signs are fixed to either end of the base of an isosceles triangle. The electric field at the midpoint M between the charges has a magnitude EM. The field directly above the midpoint at point P has a magnitude EP. The ratio ...
Thursday, February 14, 2013 at 5:19pm by shaun
physics
what can we learn from an analysis of a stellar spectrum?
Friday, December 4, 2009 at 3:52pm by Doly V
geometry
From the way you ask the question, I assume that d is a point between e and m. Just draw the diagram. ed+dm = em x+4 + 3x-8 = ? Unless you know em, there's no way to assign a value to ed or dm.
Wednesday, October 19, 2011 at 9:13pm by Steve
physics EM
please help by 9am.
Monday, April 7, 2008 at 4:51pm by Spencer
chemistry -- CHMA11
the chma11 midterm is fast approaching in 2 weeks, june 18. i was just wondering if anyone has previous tests or knows were to find them or samples that could be used for studying..if so could you let me know with some sort of contact that we cud do..or could u post em here or...
Wednesday, June 3, 2009 at 6:36pm by chemist
physics EM repost
good. but actually, N=L/d
Monday, March 31, 2008 at 2:15pm by bobpursley
physics EM repost
ok i got it finally. thanks
Monday, March 31, 2008 at 2:15pm by Spencer
physics EM
the answer was a and b wow thats retarded.
Monday, March 24, 2008 at 2:21pm by Spencer
Physics
This question was answered several days ago by Elena and by Bob: physics Posted by andrej on Saturday, June 2, 2012 at 8:10am. A tungsten target is struck by electrons that have been accelerated from rest through a 24.5-kV potential difference. Find the shortest wavelength of ...
Thursday, June 7, 2012 at 8:35am by Damon
Physics-PLEASE HELP ASAP
Elena and Bob replied to this question from another student: physics Posted by andrej on Saturday, June 2, 2012 at 8:10am. A tungsten target is struck by electrons that have been accelerated from rest through a 24.5-kV potential difference. Find the shortest wavelength of the ...
Thursday, June 7, 2012 at 8:46am by Damon
Could someone help me proofread?
i can hand out a million vaccinations or let em all die in exasperation! I can make anybody go to prison just bcuz i dont em! and i keep rythym with no metranome with no metranome no metrnome and i can see ur face on the telefone on the telefone on the telefone!
Thursday, December 28, 2006 at 2:13am by anonymoussssss :)
physics EM
Spencer is wrong. Just so you guys know
Tuesday, April 8, 2008 at 10:15am by John
Physics EM
Give up - this question is impossible.
Monday, March 10, 2008 at 7:50pm by Steve
physics EM
i need to know the forms of basic crystals
Monday, March 24, 2008 at 2:16pm by shelly
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-...
Friday, September 16, 2011 at 8:05am by AfterLife
Physics
An emission spectrum will be produced. Some, but not all, of the radiation emitted will be visible.
Tuesday, March 6, 2012 at 12:33am by drwls
Integrated Physics and Chemistry
The ____ motion of a star can be determined by studying its spectrum
Tuesday, May 10, 2011 at 2:46pm by ashlee. :D
Physics
Very few, if any, tungsten atoms are excited; therefore, there is no line spectrum.
Thursday, March 27, 2008 at 11:42pm by DrBob222
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.
Saturday, May 12, 2007 at 8:09pm by Pet
physics EM
OK. Glad you were able to figure it out. Thanks for letting us know
Monday, March 31, 2008 at 1:22pm by drwls
physics EM
thanks i guess i need to read up on the turns in coils.
Monday, March 31, 2008 at 10:31am by Spencer
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?
Saturday, November 27, 2010 at 10:08pm by Mandy
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?
Saturday, November 27, 2010 at 2:03am by Mandy
Physics
An EM wave has a wavelength of 620 nm. What is its frequency? How would we classify it?
Thursday, April 12, 2012 at 9:08am by Charlie
physics
(a) K = 1/2 mv^2 - you have the numbers. plug 'em in (b) PE = KE (c) s = v^2/2a
Friday, December 9, 2011 at 1:32pm by Steve
physics EM
nvm dangit it works. just off by a small amount.
Tuesday, April 8, 2008 at 10:15am by Spencer
physics EM
nevermind i got it im just stupid with a calculator i guess.
Monday, March 31, 2008 at 1:22pm by Spencer
chemistry
The spectrum of an element consists of a series of wavelengths (colors in the visible spectrum but there are wavelengths in the ultraviolet and infrared regions, also) that are emitted by the excited atom(s) of the element. In practice, the wavelengths are sent through an ...
Monday, November 9, 2009 at 8:08pm by DrBob222
Physics
What observation shows that diamond has a slightly different index of refraction for each of the various colours of the spectrum?
Tuesday, February 15, 2011 at 10:55pm by Susan
Intro Physics
An EM wave has a wavelength of 620 nm. What is its frequency? How would we classify it?
Thursday, April 12, 2012 at 1:33pm by ###Nadine####
physics
W = GmM/r^2 in each case. Go look up the radii involved and plug 'em in.
Wednesday, February 8, 2012 at 8:55am by Anonymous
physics EM
oops theres a D too. D. over the surface bounded by the current-carrying wire.
Monday, March 24, 2008 at 2:16pm by Spencer
physics
please help me i dont know the answer. What is the mathematical relationship between frequency and wavelength for an EM wave?
Thursday, January 12, 2012 at 8:57pm by Jessie
science
What happens is that a single electron changes its orbit. In an emission spectrum, an electron makes a transition from a higher to a lower energy state, causing a photon to be emitted at a particular frequency. In a very hot gas, many transitions of this type are going on ...
Thursday, June 9, 2011 at 7:37pm by drwls
Physics
In classical mechanics, the electron would decelerate and emit a continous spectrum as it heads for and crashes into the nucleus.
Thursday, April 10, 2008 at 8:59pm by drwls
physics
What is the frequency of the EM wave emitted most strongly by a glowing element on a stove with temperature 1,500 K
Thursday, April 28, 2011 at 9:55am by Mateo
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...
Monday, September 18, 2006 at 9:40pm by Patty
English:Poetry
Hi beautiful people :) For English we need to select a poem and write a story based on the poem. The poem I have selected tentatively is William Wordsworth's "There was a Boy". What I was wondering was whether the boy jumped off the cliff, fell off the cliff or ...
Tuesday, January 24, 2012 at 5:41am by Em
Algebra
Pick two points that satisfy the equation, and connect them with a line. The easiest ones are where x=0 (will give you a point on the y-axis) and where y=0 (will give you a point on the x-axis). So, if x=0, 0 + 2y = 2 so y=1 If y=0, -3x + 0 = 2, so x = -2/3 So, now you have ...
Monday, October 17, 2011 at 9:17pm by Steve
English
It's the stage name of a rapper. http://en.wikipedia.org/wiki/Eminem Pronunciation is like this: em-n-em
Saturday, March 27, 2010 at 7:55am by Writeacher
physics EM
what did you plug into the solenoid equation? What did you take as dB/dt? Let me see you work, I suspect the error is in the detail.
Monday, April 7, 2008 at 4:51pm by bobpursley
Physics EM
wow your right i feel stupid. i thought the other resistor added was different. now it makes sense thanks.
Thursday, March 6, 2008 at 11:32am by Spencer
physics
in pl spectrum what is the red shift and blue shift and also give the interpretaion
Saturday, November 27, 2010 at 3:42am by pradee
ENGLISH
k like i have to write something for english like a persasuive essay. so here the ? the goverment had decided to make alll junk food illegal. you have to write a letter the gov teling em that u agree wid em or disagree. u have to have 3 main points as to why u agree or disgree...
Saturday, November 10, 2007 at 9:19am by Anonymous
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...
Friday, January 12, 2007 at 12:35am by Lyn
physics
true. The sunlight spectrum is the result of all elements spectra coming from the sun, whereas one atom is a tiny part of the spectum.
Monday, November 2, 2009 at 9:17pm by bobpursley
physics EM please
please look at my earlier question below thank you
Monday, April 7, 2008 at 7:26pm by Spencer
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) ...
Thursday, November 17, 2011 at 12:50pm by Lisa
physics EM
nvm found it elsewhere. turns out i had my calc in degrees instead of radians. dont you just hate when that happens.
Monday, April 7, 2008 at 4:51pm by Spencer
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. ...
Friday, April 18, 2008 at 1:55pm 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?
Monday, February 4, 2013 at 6:10pm by Alex
Honors Chemistry
You might make a graph with the x-axis wavelength and the y-axis element. You may need to look up the wavelengths. The yellow line you see for Na is 589 nm, the violet for K is 404 and the crimson for Li is 671 nm (all of these are in round numbers). You can get more accurate ...
Sunday, September 20, 2009 at 11:36pm by DrBob222
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