Dual Nature of Matter and Radiation: JEE Main 2026 Physics question

JEE Main 2026 · 24 Jan, Evening shift · Q35

JEE Main 202624 Jan, Evening shiftPhysicsMediumDual Nature of Matter and Radiation146× since 2002

When a light of a given wavelength falls on a metallic surface the stopping potential for photoelectrons is 3.2 V. If a second light having wavelength twice of first light is used, the stopping potential drops to 0.7 V. The wavelength of first light is ______ m. (

h=6.63\times10^{-34}

J.s,

e=1.6\times10^{-19}

c=3\times10^8

m/s)

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JEE Main 2026 Dual Nature of Matter and Radiation Question with Solution (24 Jan Evening shift, Q35) | JEE Arc