physics
posted by anonymous .
Why is white light separated into a spectrum of colors when it is passed through a diffraction grating?
The diffraction angle (theta) is given by
n x (lambda) = d sine(theta)
where
lambda = wavelength
theta = diffraction angle
d = grating spacing
n = order (1,2,3 etc.)
so each wavelength is diffracted through a slightly different angle. If the incident light is white light then you will see a rainbow at each value of n.
Respond to this Question
Similar Questions

physics
The width of the doorway is 83 cm, and the speed of sound is 343 m/s. Find the diffraction angle when the frequency is each of the following. (a) 4.8 kHz If theta is the diffraction angle. Sine(theta)= lambda/slit width where lambda … 
Physics. Please help
A 3.00 kHz tone is being produced by a speaker with a diameter of 0.175 m. The air temperature changes from 0 to 29°C. Assuming air to be an ideal gas, find the change in the diffraction angle My solution v directly proportional to … 
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 … 
physics
Monochromatic light from a heliumneon 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 firstorder maximum. … 
physics
A diffraction grating gives a secondorder 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? 
physics
A diffraction grating gives a secondorder 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? 
physics
Can anyone explain this to me? Is it correct to say that the difference in the patterns produced by monochromatic and white light is caused by the fact that monochromatic light waves interfere with each other when they pass through 
physics
What happens to the diffraction pattern when you have a small wavelength and large slit width in single slit interference? 
Wavelength of a light
A single vertical slit of width 24000 nm is located 2.10 m from a screen. The intensity pattern below is observed. The distances on the screen can be measured from the scale. Each tick mark is equal to 1 cm. Intensity is displayed … 
Slit width in double slit experiment
Link to image relevant to this problem (Add a dot after "1h3" and "googleusercontent" > lh3googleusercontentcom/rL6zLQRGjdYSHMfsvAN_a4E_s3MARseiAwKmFUfP5sp5nmp3c7E43zWO9_3ZrWwez6iZQ=s108 Light of wavelength 550 nm passes through …