Question 1

State Huygens' Principle.

Accepted Answer

Huygens' Principle is a geometrical construction used to determine the shape of a wavefront at any subsequent time from its known shape at any previous time. It states that: 1. Every point on a given wavefront acts as a fresh source of secondary disturbance, emitting secondary spherical waveslets in

Question 2

What are coherent sources of light?

Accepted Answer

Coherent sources of light are defined as those sources which continuously emit light waves of the same frequency, same wavelength, and have either a zero phase difference or a constant phase difference that does not change with time. Ordinary independent sources of light cannot be coherent because l

Question 3

What is diffraction of light?

Accepted Answer

Diffraction of light is defined as the phenomenon of bending of light waves around the corners of an obstacle or an aperture into the region of geometrical shadow. This phenomenon occurs when the size of the obstacle or aperture is comparable to the wavelength of the light wave. Because of diffracti

Question 4

What is polarization of light?

Accepted Answer

Polarization of light is the phenomenon of restricting the vibrations of electric field vectors of a light wave to a single plane perpendicular to the direction of wave propagation. Ordinary light is unpolarized, meaning the electric field vectors vibrate in all possible directions perpendicular to

Question 5

State Brewster's Law.

Accepted Answer

Brewster's Law states that when unpolarized light is incident at a specific polarizing angle (also known as Brewster's angle, denoted by ip) on a transparent refracting surface, the refracted light is partially polarized while the reflected light is completely plane-polarized. Furthermore, the law s

Wave Optics