A metal has a work function of h _0 . If light of frequency is incident upon this metal, the photoelectric effect will occur only if

Correct answer: B. ≥ _0 The work function of the metal is given as W = h _0 . The energy of the incident light of frequency is E = h . For the photoelectric effect to occur, the energy of the incident photon must be greater than or equal to the work function of the metal. E ≥ W h ≥ h _0 ≥ _0

Concepts Of Physics MCQ Edition [Volume 2]

Exam: Concepts Of Physics MCQ Edition [Volume 2]
Subject: Physics
Chapter: Photoelectric Effect and Wave–Particle Duality

Concepts Of Physics MCQ Edition [Volume 2] · Physics · Photoelectric Effect and Wave–Particle Duality

A metal has a work function of h _0 . If light of frequency is...

A metal has a work function of

h\nu_0

. If light of frequency

\nu

is incident upon this metal, the photoelectric effect will occur only if

Options

A $\nu > 2\nu_0$
B $\nu \geq \nu_0$
C $\nu < \dfrac{\nu_0}{2}$
D $\nu < \nu_0$

Correct answer

B. $\nu \geq \nu_0$

Step-by-step solution

The work function of the metal is given as

W = h\nu_0

.

The energy of the incident light of frequency

\nu

E = h\nu

.

For the photoelectric effect to occur, the energy of the incident photon must be greater than or equal to the work function of the metal.

E \geq W

h\nu \geq h\nu_0

\nu \geq \nu_0

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