Question

The wavelength range for a grating is _______

(a) 200 nm – 400 nm

(b) 400 nm – 800 nm

(c) 800 nm – 1200 nm

(d) 200 – 800 nm

I had been asked this question in an international level competition.

I need to ask this question from Difference Between Prism and Grating Spectra topic in division Diffraction of Engineering Physics II

Answer 1

Correct choice is (b) 400 nm – 800 nm

The explanation is: For a grating, the wavelength range is from 400 nm to 800 nm. For a prism, the wavelength range is from 365 mm to 920 mm.