Question

a photon of wavelength 4×10⁷ strikes on metal surface the work function of the metal being 2.13eV. calculate the energy kinetic energy and velocity of electron
​

Answer 1

Answer:

a photon of wavelength 4×10⁷ strikes on metal surface the work function of the metal being 2.13eV. calculate the energy kinetic energy and velocity of electron

Answer 2

Answer:

For Kinetic energy

KE= hν − hν = 0 3.1 − 2.13 = 0.97eV Ans.

For Velocity

1/2 mv^2 = 0.97eV = 0.97 × 1.6 × 10−19

Or, 1/2(9.11×10^-31)= 2 0.97 × 1.6 × 10−19

Or, v^2 = 34.1 × 1010

Or, v = 5.84 × 10 m/s Ans

Explanation:

I hope it help you.