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22-04-2020
Physics

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What is the wavelength in nm of a light whose first order bright band forms a diffraction angle of 30 degrees, and the diffraction grating has 700 lines per mm?

Respuesta :

mandyboo704 mandyboo704

23-04-2020

Answer:

The wavelength is 3500 nm.

Explanation:

d= [tex]\frac{1}{700 lines per mm} = 0.007mm = 7000 nm[/tex]

n= 1

θ= 30°

λ= unknown

Solution:

d sinθ = nλ

λ = [tex]\frac{7000 nm sin 30}{1}[/tex]

λ = 3500 nm

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