Question

When the light of frequency 2v₀ (where v₀ is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is v₁. When the frequency of the incident radiation is increased to 5v₀, the maximum velocity of electrons emitted from the same plate is v₂. The ratio of v₁ to v₂ is :- 

(1) 1 : 2 

(2) 1 : 4 

(3) 4 : 1 

(4) 2 : 1

Answer 1

From Einstein's equation of PEE