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JEE Main 2020 (Online) 7th January Morning Slot

Numerical

+4

-0

A beam of electromagnetic radiation of intensity 6.4 × 10

^{–5}W/cm^{2}is comprised of wavelength, $$\lambda $$ = 310 nm. It falls normally on a metal (work function $$\phi $$ = 2eV) of surface area of 1 cm^{2}. If one in 10^{3}photons ejects an elctron, total number of electrons ejected in 1 s is 10^{x}. (hc = 1240 eVnm, 1eV = 1.6 × 10^{–19}J), then x is _____.Your input ____

Questions Asked from Dual Nature of Radiation (Numerical)

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