Home Physics Electron, Photon, Photoelectric Effect and X-rays JEE Main 2022 - ( Dual Nature of Matter ) With reference to the observations in photo-…
Physics Electron, Photon, Photoelectric Effect and X-rays JEE Main 2022 - ( Dual Nature of Matter ) MCQ (Single Correct)

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

A
The square of maximum velocity of photoelectrons varies linearly with frequency of incident light. A and B only
B
The value of saturation current increases on moving the source of light away from the metal surface, A and E only
C
The maximum kinetic energy of photo-electrons decreases on decreasing the power of LED (light emitting diode) source of light. C and E only
D
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

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The correct answer is:
B

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

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