Monochromatic light is incident on a grating that is 75 mm wide and ruled with 50,000 lines. The second-order maximum is seen at 32.5°. What

Question

Monochromatic light is incident on a grating that is 75 mm wide and ruled with 50,000 lines. The second-order maximum is seen at 32.5°. What is the wavelength of the incident light? 202 nm 605 nm 806 nm 403 nm 452 nm

in progress 0
Jezebel 3 years 2021-08-10T09:03:18+00:00 1 Answers 59 views 0

Answers ( )

  1. linhdan
    0
    2021-08-10T09:04:53+00:00
    Reply

    Answer:

    = 403 nm

    Explanation:

    We have the condition for the maximum for a diffraction grating

                                         d sinθ =mλ

    Then the grating constant d = w/N

                                        = (75 mm)/(50,000)

                                          = 0.0015 mm

    Then wavelength of light is λ = (dsinθ)/m

                                            = (0.0015 mm)(sin 32.5)/2

                                         =403*10-6 mm

                                            = 403 nm

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )