The distance between the ruled lines on a diffraction grating is 1900 nm. The grating is illuminated at normal incidence with a parallel beam of white light in the 400 nm to 700 nm wavelength band. What is the angular width of the gap between the first order spectrum and the second order spectrum

3.28 degree

Explanation:

We are given that

Distance between the ruled lines on a diffraction grating, d=1900nm=

Where

We have to find  the angular width of the gap between the first order spectrum and the second order spectrum.

We know that

Using the formula

m=1

Now, m=2

Hence, the angular width of the gap between the first order spectrum and the second order spectrum=3.28 degree

answer: what are you talking about?

explanation:

its a 5.5 n

glad that