Question

It is found that when blue light, λ = 470 nm, passes through a diffraction grating with a slit separation d, the diffraction pattern has a third order maximum at an angle θ = 44.8^o. At what angle will red light, λ = 660 nm, have it's second order maximum when passed through the same diffraction grating.

• A.

  29.4^o

• B.

  39.7^o

• C.

  41.3^o

• D.

  31.6^o

Answer 1

so correct option is (c) 41.3°