Question

When light is refracted into a medium, 

(a) its wavelength and frequency both increase 

(b) its wavelength increases but frequency remains unchanged 

(c) its wavelength decreases but frequency remains unchanged 

(d) its wavelength and frequency both decrease

Answer 1

The correct option is (b).

Explanation:

According to Snell’s law

(Frequency of wave does not change on refraction)