Definition

Question 1

Diffraction

Answer 1

Diffractionis the spreading of waves through a slit or round an obstacle

Question 2

Diffraction Grating

Answer 2

A diffraction grating consists of many parallel, close slits which are ruled either on glass or on metal

Question 3

Wave

Answer 3

A wave is a disturbance that generally travels from one point to another

When a progressive wave travels in a medium, energy is transported from one point to another without transferring of matter

Question 4

Energy E

Answer 4

As a waves travel through a medium, energy is transmitted as vibrational energy from particle to particle

Question 5

Electromagnetic Waves

Answer 5

Electromagnetic Waves are transverse oscillations that carry waves of electric fields and magnetic fields which need no medium to support them

Question 6

The Principle of Superposition

Answer 6

When two waves are superimposed, the displacement of the resultant wave at any point is the algebraic sum of displacements due to each wave at that point