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प्रश्न
Write the important characteristic features by which the interference can be distinguished from the observed diffraction pattern.
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उत्तर
Important characteristic features:
1. Interference is the result of the interaction of light coming from two different waves originating from two coherent sources, whereas the diffraction pattern is the result of the interaction of light coming from different parts of the same wavefront.
2. The fringes may or may not be of the same width in case of interference, while the fringes are always of varying width in diffraction.
3. In interference, the fringes of minimum intensity are perfectly dark and all bright fringes are of the same intensity. In diffraction, the fringes of minimum intensity are not perfectly dark and the bright fringes are of varying intensity.
4. There is a good contrast between the bright and dark fringes in the interference pattern. The contrast between the bright and dark fringes in the diffraction pattern is comparatively poor.
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संबंधित प्रश्न
Answer in brief:
In Young's double-slit experiment what will we observe on the screen when white light is incident on the slits but one slit is covered with a red filter and the other with a violet filter? Give reasons for your answer.
The intensity of the light coming from one of the slits in Young's experiment is twice the intensity of the light coming from the other slit. What will be the approximate ratio of the intensities of the bright and dark fringes in the resulting interference pattern?
Describe geometry of the Young’s double slit experiment with the help of a ray diagram. What is fringe width? Obtain an expression of it. Write the conditions for constructive as well as destructive interference.
In a Young’s double-slit experiment, the slit separation is doubled. To maintain the same fringe spacing on the screen, the screen-to-slit distance D must be changed to ______.
Obtain the relation between phase difference and path difference.
Obtain the equation for bandwidth in Young’s double slit experiment.
If the two slits in Young's double slit experiment have width ratio 9 : 1, the ratio of maximum to minimum intensity in the interference pattern is ______.
In a biprism experiment, the slit separation is 1 mm. Using monochromatic light of wavelength 5000 Å, an interference pattern is obtained on the screen. Where should the screen be moved? so that the change in fringe width is 12.5 x 105 m?
In Young's double slit experiment, for wavelength λ1 the nth bright fringe is obtained at a point P on the screen. Keeping the same setting, source of light is replaced by wavelength λ2 and now (n + 1)th bright fringe is obtained at the same point P on the screen. The value of n is ______.
If we have two coherent sources S1 and S2 vibrating in phase, then for an arbitrary point P constructive interference is observed whenever the path difference is ______.
