Threshold frequency of a metal is 5 10¹³ ~s ⁻¹ upon which 1 10¹⁴ ~s ⁻¹ frequency light is focused. Then the maximum kinetic energy of emitted electron is

Step-by-step solution

Following the conservation of energy principle, Kinetic energy ( 1 2 m_e v^2 )=h (v-v₀ )= (6.626 10⁻³⁴ ~J ~s ) (1 10¹⁴ ~s ⁻¹-5 10¹³ ~s ⁻¹ )= (6.626 10⁻³⁴ ~J ~s ) (5 10¹³ ~s ⁻¹ )=3.313 10⁻²⁰ ~J