Dual Nature of Radiation and Matter - Online Test

Q1. According to the Einstein’s model minimum energy needed for the electron to escape from a metal surface having work function , the electron is emitted with maximum kinetic energy =
Answer : Option D
Explaination / 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.


Q2. According to the Einstein’s model stopping potential for a metal having work function ϕ0 is given by
Answer : Option A
Explaination / Solution:


eV0=KmaxKmax=hνϕ0eV0=hνϕ0V0=(he)νϕ0e

Q3. In interaction of radiation with matter, radiation behaves as if it is made up of particles called
Answer : Option C
Explaination / 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.

Q4. Each photon has the same speed but different
Answer : Option C
Explaination / Solution:

Each photon travels with the speed of light. Energy of photon is hν. ν is the frequency of photon. Energy depends on frequency.

Q5. Photon has a charge of
Answer : Option A
Explaination / Solution:

Photon has no charge. Photon is the packets of energy.

Q6. Photons can be
Answer : Option D
Explaination / 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.

Q7. In a photon-particle collision (such as photon-electron collision) the quantity which is not conserved is
Answer : Option B
Explaination / Solution:
No Explaination.


Q8. Davisson Germer experiment proves that
Answer : Option B
Explaination / Solution:
No Explaination.


Q9. A photon is
Answer : Option C
Explaination / Solution:

Photon is the small packet of light energy. The photon has zero rest mass and moves with the speed of light.

Q10. A photoelectric cell converts
Answer : Option B
Explaination / Solution:
No Explaination.