A photon of energy h v is absorbed by a free electron of a metal having work-function $ϕ < h v .$ Choose th correct option(s).

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

Either the electron does not come out or it comes out with a kinetic energy $h v - ϕ$

It may come out with a kinetic energy less than and equal to $h v - ϕ$

The electron is sure to come out with a kinetic energy $h v - ϕ$

Number of electrons coming out depends o magnitude of v

answer is D.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

When a photon's energy exceeds the work function ( $ϕ$ ), the electron absorbs the extra energy as kinetic energy. Consequently, the highest kinetic energy is

${KE}_{max} = h v - ϕ$ . As a result, choice (D).

Watch 3-min video & get full concept clarity

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Get Expert Academic Guidance – Connect with a Counselor Today!