Question

Which one of the following properties of light does not support the wave theory of light?

• A. Light obeys the laws of reflection and refraction
• B. Light waves get polarised
• C. Light shows a photoelectric effect
• D. Light shows interference

Answer 1

The correct option is C

Light shows a photoelectric effect

The explanation for the correct option:

Option (C) Light shows a photoelectric effect

1. This property supports the particle nature of light not the wave theory of light.
2. The reason light shows a photoelectric effect is that the energy required to release electrons from metal depends on the light's frequency, not the intensity.

The explanation for the incorrect option(s):

1. Option (A) Light obeys the laws of reflection and refraction: It supports the wave theory of light as it is accompanied by a change in speed and wavelength of the waves.
2. Option (B) Light waves get polarised: It also supports the wave theory of light.
3. Option (D) Light shows interference: The Young's interference experiment showed that it supports the wave theory of light.

Hence, the correct answer is an option (C).