WAVES OPTICS

Question 1

STATE HYGENS PRINCIPLE

Answer 1

Such a locus of points, which oscillate in phase is called a
wavefront; thus a wavefront is defined as a surface of constant phase. The speed with which the wavefront moves outwards from the source is called the speed of the wave. The energy of the wave travels in a direction perpendicular to the wavefront.

Question 2

DEFINE COHERENT SOURCE

Answer 2

The source which emits a light wave with the same frequency, wavelength and phase or having a constant phase difference is known as a coherent source.

Question 3

LEARN DESTRUCTIVE AND CONSTRUCTIVE INTERFERANCE

Question 4

LEARN YDS

Question 5

DEFINE DIFFERACTION

Answer 5

Diffraction of light is defined as the bending of light around corners such that it spreads out and illuminates areas where a shadow is expected.

Question 6

LEARN SINGLE SLIT diffraction

Question 7

DEFINE POLARISATION

Answer 7

Polarisation of light is a property shown by transverse waves. The light waves which travel only in a single plane are known as polarized light waves. The process of transforming unpolarized light waves to polarized light waves is called the polarisation of light

Question 8

define malus law

Answer 8

I = I0cos²q

Question 9

USE OF POLARIODS

Answer 9

Polaroids can be used to control the intensity, in sunglasses, windowpanes, etc. Polaroids are also used in photographic cameras and 3D movie cameras.