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Green light of wavelength 500 nm passes through a diffraction grating having 10−610−6 m between lines.  ...

Green light of wavelength 500 nm passes through a diffraction grating having 10−610−6 m between lines.  

How far away from the central bright spot is the next bright spot on a screen 2 m away (in meters)?

Suppose the light passing through the diffraction grating is composed of many different wavelengths. Rank the following colors according to the spacing between the bright spots of that color from least to greatest, so the least would have the smallest spacing between maxima.

a. red, yellow, green, blue, violet

b. green, blue, yellow, red, violet

c. violet, blue, green, yellow, red

d. blue, green, yellow, violet, red

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