Question

if p is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having​

Answer 1

Answer:

ANSWER

Solution:- (D) 94λ

hv−ϕ=KE

⇒(λhc)incident=KE+ϕ

(λhc)incident≃KE

KE=2mp2=λincidenthc=λhc     ...(1)

⇒2mp2×(1.5)2=λ′hc                 ...(2)

divide (1) and (2)

(1.5)2=λ′λ

⇒λ′=94λ