A beam of electromagnetic radiation of intensity 6.4 × 10^–5 W/cm² is comprised of wavelength, λ = 310 nm. It falls normally on a metal (work function φ = 2eV) of surface area of 1 cm². If one in 10³ photons ejects an elctron, total number of electrons ejected in 1 s is 10ˣ. (hc = 1240 eVnm, 1eV = 1.6 × 10^–19 J), then x is _ _ _.

Dual Nature of Matter and Radiation: JEE Main 2020 Physics question

JEE Main 2020 · 7 Jan, Morning shift · Q48

JEE Main 20207 Jan, Morning shiftPhysicsMediumDual Nature of Matter and Radiation146× since 2002

A beam of electromagnetic radiation of intensity 6.4 × 10^–5 W/cm² is comprised of wavelength,

\lambda

= 310 nm. It falls normally on a metal (work function

\phi

= 2eV) of surface area of 1 cm². If one in 10³ 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 answerType your answer. Integers and decimals are accepted.

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