Q1.According to the Einstein’s model minimum energy needed for the electron to escape from a metal surface having work function ϕ0, the electron is emitted with maximum kinetic energy Kmax=
Answer : Option DExplaination / Solution:
When any photon is incident on a metal surface it gives its total energy to a electron. Some energy(Work Function) is used up in come out from the metal surface and remaining energy is kinetic energy of electron.
Q3.In interaction of radiation with matter, radiation behaves as if it is made up of particles called
Answer : Option CExplaination / Solution:
Photon is the small packet of energy. Rest mass of photon is zero but its kinetic mass is not zero. The photon travels with the speed of light.
Answer : Option CExplaination / Solution:
Each photon travels with the speed of light. Energy of photon is hν.
ν is the frequency of photon. Energy depends on frequency.
Answer : Option DExplaination / Solution:
If photon strike with loosely bound electron then photoelectric effect takes place.Collision of photon with completely free electron give rise to Compton effect or Compton scattering.