Question

Photons have the following characteristics:
(i) energy of a photon $E=h\gamma$
(ii) photons travel with the velocity of light
(iii) photons are emitted when light of frequency $\gamma$ is emitted by an atom

• A. (i), (ii)
• B. (ii), (iii)
• C. (i), (ii) and (iii)
• D. Only (i)

Answer 1

The correct option is C (i), (ii) and (iii)

(i), (ii), (iii)

A photon is a particle of light defined as discrete bundles or quantum of electromagnetic energy.

Properties of photon :

• Photons always moves with the speed of light.
• Photons are electrically neutral
• Photons have no mass but they have energy.
• $E=hv$ where h is the planks constant.
• The energy of each photon is inversely proportional to the wavelength of the associated EM wave.
• $E=hv=h\frac{c}{\lambda }$
• Photons can be created or destroyed.