Question

The field of view for human vision is limited by how wide an angle is clearly seen. Greg, a physics student, sees patterns and colors to an angle of 12∘12∘ to the right and to the left while looking straight ahead. When holding a diffraction grating to view a light source emitting a very narrow line of 410 nm410 nm violet light, Greg sees a number of repeating violet lines.

For a diffraction grating engraved with 270 lines/mm,270 lines/mm, how many lines NN of violet light will Greg be able to see while looking straight ahead through the grating?

Answer 1

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