Question

When light passes from air to glass, it experiences a change of:

• A. speed only
• B. wavelength and speed
• C. frequency only
• D. frequency and speed

Answer 1

The correct option is B wavelength and speed

When light passes from air to glass it experience change in refractive index. and due to change in refractive index the wavelength of light changes and hence speed.

${\lambda }_M=\frac{{\lambda }_A}{\mu }{\lambda }_A=wavelenthinair{\lambda }_M=wavelengthinmedium\mu =refractiveindexofmedium{V}_M=\frac{V_A}{\mu }{V}_A=velocityinair{V}_M=velocityinmedium$

Option B is correct.