In a photoelectric experiment ultraviolet light of wavelength 280 nm is used with lithium cathode having work function φ = 2.5 eV. If the wavelength of incident light is switched to 400 nm, find out the change in the stopping potential. (h = 6.63 × 10⁻³4 Js, c = 3 × 10⁸ ms⁻¹)

Dual Nature of Matter and Radiation: JEE Main 2021 Physics question

JEE Main 2021 · 26 Aug, Morning shift · Q6642

JEE Main 202126 Aug, Morning shiftPhysicsMediumDual Nature of Matter and Radiation146× since 2002

In a photoelectric experiment ultraviolet light of wavelength 280 nm is used with lithium cathode having work function

\phi

= 2.5 eV. If the wavelength of incident light is switched to 400 nm, find out the change in the stopping potential. (h = 6.63

\times

10^

-

34 Js, c = 3

\times

10⁸ ms^

-

JEE Main 2021 Dual Nature of Matter and Radiation Question with Solution (26 Aug Morning shift, Q6642) | JEE Arc