What is the wavelength of light that is deviated in the first order through an angle of 13.1 ∘ by a transmission grating having 5000 slits/cm? assume normal incidence.

The wavelength of light is

Explanation:

Given that,

Angle = 13.1°

Number of slits = 5000

We need to calculate the wavelength of light

Diffraction of first order is defined as,

.....(I)

The separation of the slits

Now put the value in equation (I)

Here, n = 1

Hence, The wavelength of light is