# Physics

When light of a certain wavelength is incident normally on a certain diffraction grating the line of order 1 is at a diffraction angle of 25 degrees. The diffraction angle of the second order line is :
a) 25
b) 42
c) 50
d) 58
e) 75

I am not sure how to do this problem since it does not have enough information to use the diffraction equations in the book. So, I do not know how to handle the problem.

Thank you

n lambda = d sin( theta )
Since the order n doubles from 1 to 2, so does the sine of the diffraction angle. Find the angle that has twice the sine of 25 degrees. It is not 50 degrees.

1. 👍
2. 👎
3. 👁
1. d) 58

you said find the angle that is double sin25 (not sin50)

so 2 x sin 25 gets you .84523

find what angle that is using inverse sin

sin^-1 (.84523) = 57.697

1. 👍
2. 👎

## Similar Questions

1. ### physics

Monochromatic light from a helium-neon laser (wavelength=632.8 nm) shines at a right angle onto the surface of a diffraction grating that contains 130 960 lines/m. Find the angle at which one would observe the first-order maximum.

2. ### physics

A diffraction grating gives a second-order maximum at as angle of 31‹ for violet light (ƒÉ = 4.0 ~ 102 nm). If the diffraction grating is 1.0 cm in width, how many lines are on this diffraction grating?

3. ### Physics

Rank in order the following according to their speeds, from fastest (1) to slowest (5): (i) 425-nm-wavelength light through a pane of glass, (ii) 500-nm-wavelength light through air, (iii) 540-nm-wavelength light through water,

4. ### Physics -Interference & Diffraction

Given Information: Light of wavelength 631 nm passes through a diffraction grating having 485 lines/mm. Part A: What is the total number of bright spots (indicating complete constructive interference) that will occur on a large

1. ### Physics

Yellow light of wavelength 5.5 x 10^-7 m is incident normally at a diffraction grating with 300 lines per mm. Calculate the angle between the first-order and second-order maxima.

2. ### Physics

A monochromatic light source used in a diffraction experiment has a wavelength of 4.60 x 10- 7 m. (a) What is the frequency of this light? When you input large numbers such as those in this problem, then input the numbers with

3. ### Chemistry

Neutron diffraction is used in determining the structures of molecules. (a) Calculate the de Broglie wavelength of a neutron moving at 9.00% of the speed of light. __ m (b) Calculate the velocity of a neutron with a wavelength of

4. ### Physics

Diffraction grating #1 has half the lines/cm that diffraction grating #2 does. When used with a certain wavelength of light, both gratings give first order maxima. Which of the following statements is true for the same wavelength

1. ### 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

2. ### Physics

Consider two diffraction gratings. One grating has 3000 lines per cm, and the other one has 6000 lines per cm. Both gratings are illuminated with a beam of the same monochromatic light. Which grating produces the greater

3. ### Physics help I am stuck

Monochromatic light strikes a diffraction grating at normal incidence before illuminating a screen 1.81 m away. If the first-order maxima are separated by 1.40 m on the screen, what is the distance between the two second-order

4. ### Physics

When the light of a wavelength 450 nm is passed through a certain diffraction grating, the first order diffraction maximum is found to be at an angle of 35° to the straight through. Calculate the distance between adjacent slits