Diffraction Of Light - Practice Questions & MCQ

Diffraction

The phenomenon of bending of light around the corners of an obstacle of the size of the wavelength of light is called diffraction. 

• The phenomenon resulting from the superposition of secondary wavelets originating from different parts of the same wavefront is defined as a diffraction of light.
•  Diffraction is the characteristic of all types of waves.
•  The wavelength of the wave is directly proportional to its degree of diffraction.   

From the above figure, we can say that if slit width is more then wave will detract less.

Condition for Diffraction: 

• The essential condition for diffraction to occur is that the wavelength of light should be comparable to that of the size of the obstacle.

     i.e If the size of the obstacle is comparable to that of the wavelength of the wave only then we can observe the diffraction phenomena.