Q115 / 180 · AIIMS 2018 (26 May) · Physics

Assertion : Photoelectric effect demonstrates the wave nature of light. Reason: The number of photoelectrons is proportional to the frequency of light.

A
If both assertion and reason are true and reason is the correct explanation of assertion.
B
If both assertion and reason are true but reason is not the correct explanation of assertion.
C
If assertion is true but reason is false.
Correct answer
D
If both assertion and reason are false.

Solution

Photoelectric effect demonstrates particle nature of light. Also The number of photoelectrons depends on the intensity and not on frequency of light. Hence both assertion and reason are false.

Hence, the correct answer is option: 'D'.

Relevant Questions

The energy flux of sunlight reaching the surface of the earth is . How many photons (nearly) per square metre are incident on the earth per 26 May, 2019Photoelectric Effect
When light of wavelength is incident on a photosensitive surface, the stopping potential is . When light of wavelength is incident on same s26 May, 2019Photoelectric Effect
Assertion : A photon has no rest mass, yet it carries definite momentum. Reason : Momentum of photon is due to its energy and hence its equi26 May, 2019Photoelectric Effect
Assertion : Work function of aluminium is . Emission of electrons will not be possible if two photons, each of energy , strike an electron o26 May, 2019Photoelectric Effect
The maximum velocities of the photoelectrons ejected are and for the incident light of wavelength and on a metal surface respectively. The w25 May, 2019Photoelectric Effect
Maximum velocity of the photoelectron emitted by a metal is . Take the value of specific charge of the electron is . Then the stopping poten27 May, 2018Photoelectric Effect