Diffraction Of Light MCQ - Practice Questions with Answers
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MEDIUMLight is incident normally on a diffraction grating through which the first-order diffraction is seen at .The second-order diffraction will be seen at
Light is incident normally on a diffraction grating through which first-order diffraction is seen at . The second-order diffraction will be seen at
Light of wavelength is normally incident on a slit. The angular position of the second minimum from central maximum us
. The width of the slit should be
Light of wavelength is incident normally on a slit of width
. Angular width of the central maximum on the screen will be
Light of wavelength is incident normally on a slit. The first minimum of the diffraction pattern is formed at a distance of
from the central maximum. If the slit width is
, then the distance between the slit and the screen will be
Light of wavelength is incident on a slit. First minima of the diffraction pattern is found to lie at a distance of
from the central maximum on a screen placed at a distance of
from the slit. If slit width is
,then wavelength of the light used will be
Concepts Covered - 1
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.
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