Maximum kinetic energy of photon is ' E ' when wavelength of incident radiation is ' λ '. If wavelength of incident radiations is reduced to 3 λ then energy of photon becomes fou

Question

Maximum kinetic energy of photon is ' E ' when wavelength of incident radiation is ' λ '. If wavelength of incident radiations is reduced to 3 λ ​ then energy of photon becomes four times. Then work function of the metal is

TestHub · Accepted Answer

E = λ hc ​ − ϕ 0 ​ .... (i) Given: λ = 3 λ ​ and E = 4 E 4 E 4 ( λ hc ​ − ϕ 0 ​ ) λ 4 h c ​ − 4 ϕ 0 ​ λ h c ​ ϕ 0 ​ ​ = λ /3 hc ​ − ϕ 0 ​ .... ( ii ) = λ 3 hc ​ − ϕ 0 ​ = λ 3 hc ​ − ϕ 0 ​ .... ( F ro m ( i )) = λ 3 hc ​ − ϕ 0 ​ = 3 ϕ 0 ​ = 3 λ hc ​ ​

Physics - Modern Physics Question with Solution | TestHub

Options:

Doubts & Discussion