Question

For your science fair project you need to design a diffraction grating that will disperse the visible spectrum (400-700 nm) over 30.0∘ in first order.

Answer 1

Answer:

Explanation:

If d be the distance between two lines , for bright fringe in first order

d sinθ = λ

700 nm must be positioned at 30⁰

d sin30 = 700 x 10⁻⁹

d = 7 x 10⁻⁷ / .5

= 14 x 10⁻⁷

= 14 x 10⁻⁷

no of lines per m

1/ 14 x 10⁷

= 7.14 x 10⁵