Assertion: The photoelectrons produced by a m | vedclass

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(B) According to Einstein's photoelectric equation, $K_{max} = h
u - \Phi$, where $h
u$ is the energy of the incident photon and $\Phi$ is the work

Vedclass · Accepted Answer

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

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(B) According to Einstein's photoelectric equation, $K_{max} = h
u - \Phi$, where $h
u$ is the energy of the incident photon and $\Phi$ is the work function of the metal.While the maximum kinetic energy is fixed for a given frequency, photoelectrons are emitted from different depths within the metal surface.Electrons emitted from deeper layers lose some energy due to collisions before escaping the surface, resulting in a range of kinetic energies from $0$ to $K_{max}$.Thus, the Assertion is correct.The work function $\Phi$ is indeed a characteristic property of the metal, making the Reason correct.However, the Reason does not explain why there is a spread in kinetic energies; the spread is due to the varying depths of emission and subsequent energy loss.Therefore, both are correct, but the Reason is not the correct explanation of the Assertion.

Assertion: The photoelectrons produced by a monochromatic light beam incident on a metal surface have a spread in their kinetic energies.
Reason: The work function of the metal is its characteristic property.

Similar Questions

Which of the following statements is correct?

Explain the effect of the frequency of incident radiation in the experiment of the photoelectric effect.

The work function of a metal is defined as:

$A$ photoelectric cell is illuminated by a point source of light placed at a distance of $1 \ m$. If the source is moved to a distance of $2 \ m$,then:

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Assertion: The photoelectrons produced by a monochromatic light beam incident on a metal surface have a spread in their kinetic energies.Reason: The work function of the metal is its characteristic property.