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If p is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having wavelength , then for 1.5 p momentum of the photoelectron, the wavelength of the light should be :

(Assume kinetic energy of ejected photoelectron to be very high in comparison to work function):

(a)

 

(b)

 

(c)

 

(d)

 



Question ID - 52544 | SaraNextGen Top Answer

If p is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having wavelength , then for 1.5 p momentum of the photoelectron, the wavelength of the light should be :

(Assume kinetic energy of ejected photoelectron to be very high in comparison to work function):

(a)

 

(b)

 

(c)

 

(d)

 

1 Answer
127 votes
Answer Key / Explanation : (b) -

In photoelectric effect,

 = w+KE of electron

 It is given that KE of ejected electron is very high in comparison to w.

 =KE ⇒  =

New wavelength

        =  ⇒ =  

127 votes


127