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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=2 eV) of surface area 1 cm2. If one in 103 photons ejects an electron, total number of electrons ejected in 1s is 10x (hc=1240 eV−nm,1 eV=1.6×10−19 J), then x is |
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Answer» 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=2 eV) of surface area 1 cm2. If one in 103 photons ejects an electron, total number of electrons ejected in 1s is 10x (hc=1240 eV−nm,1 eV=1.6×10−19 J), then x is |
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