Questions
The electric field associated with a light wave is where x is in metre and t is in second. If this light is used to produce photo-electric emission from the surface of a metal of work-function 1'9 eV, then the stopping potential will be
detailed solution
Correct option is A
Given thatE=E0sin1⋅57×107(x−ct) We know that, E=E0sin2πλ(x−ct) Comparing, we get λ=2π1⋅57×107m ∴ Energy of photon =hcλ =6⋅64×10−343×1081⋅57×1072π×1⋅6×10−19eV =3⋅1eV So, maximum K.E. of photo-electron =3⋅1−1⋅9=1⋅2eV This is equal to the stopping potential.Talk to our academic expert!
Similar Questions
The work functions of three metals A,B and C are WA, WB and WC respectively. They are in the decreasing order. The correct graph between stopping potential V0 and frequency V of incident radiation is
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