A photoemissive substance is illuminated with a radiation of wavelength λ i so that it releases electrons with de-Broglie wavelength λ e. The longest wavelength of radiation that can emit photoelectron is λ o. Expression for de-Broglie wavelength is given by: (m: mass of the electron, h: Planck's constant and c: speed of light)

(B) λ e =√(h/(2mc(1/(λ i)-1/(λ o))))

(C) λ e =h/(√(2mc(1/(λ i)-1/(λ o))))

Dual Nature of Matter and Radiation: JEE Main 2025 Physics question

JEE Main 2025 · 7 Apr, Evening shift · Q44

JEE Main 20257 Apr, Evening shiftPhysicsMediumDual Nature of Matter and Radiation146× since 2002

A photoemissive substance is illuminated with a radiation of wavelength

\lambda_i

so that it releases electrons with de-Broglie wavelength

\lambda_e

. The longest wavelength of radiation that can emit photoelectron is

\lambda_o

. Expression for de-Broglie wavelength is given by : (

m

: mass of the electron,

h

: Planck's constant and

c

: speed of light)

JEE Main 2025 Dual Nature of Matter and Radiation Question with Solution (7 Apr Evening shift, Q44) | JEE Arc