With reference to the observations in photo-electric effect…

Physics Dual Nature of Matter & Radiation Photoelectric Effect Single Correct MCQ

Published on: September 12, 2026

With reference to the observations in photo-electric effect, identify the correct statements from below:

The square of maximum velocity of photoelectrons varies linearly with frequency of incident light. A and B only

The value of saturation current increases on moving the source of light away from the metal surface, A and E only

The maximum kinetic energy of photo-electrons decreases on decreasing the power of LED (light emitting diode) source of light. C and E only

The immediate emission of photo-electrons out of metal surface cannot be explained by particle nature of light/electromagnetic waves. (E) Existence of threshold wavelength cannot be explained by wave nature of light/electromagnetic waves. Choose the correct answer from the options given below: D and E only

Text Solution

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The correct answer is:

Photoelectric effect can be explained by particle nature of light. Threshold is max wavelength at which emission takes place.

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