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प्रश्न
State differences between interference and diffraction patterns.
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उत्तर
| Interference Pattern | Diffraction Pattern | |
| 1 | In interference pattern the intensity of dark fringe is completely zero. | In diffraction pattern the intensity of secondary minima is minimum, but not completely zero. |
| 2 | In interference pattern the width of all the interference fringes is equal. | In diffraction pattern the width of central maxima is large, and on increasing distance, the width of maxima decreases. |
| 3 | In interference pattern the intensity of all the bright bands is equal. | In diffraction pattern the intensity of all the secondary maxima is not equal. |
संबंधित प्रश्न
(i) State the essential conditions for diffraction of light.
(ii) Explain diffraction of light due to a narrow single slit and the formation of pattern of fringes on the screen.
(iii) Find the relation for width of central maximum in terms of wavelength 'λ', width of slit 'a', and separation between slit and screen 'D'.
(iv) If the width of the slit is made double the original width, how does it affect the size and intensity of the central band?
Derive the relation a sin θ = λ for the first minimum of the diffraction pattern produced due to a single slit of width 'a' using light of wavelength λ.
Which items are used to form the narrow, uniform slit?
Which electric bulb is required for the observation?
Which items are optional in the apparatus?
In what order are the colour filters used when repeating the observation?
What happens when the slit is not parallel to the filament?
What happens to the bands when the slit width is narrowed?
Why is the fringe pattern narrower with a blue colour filter?
What is visible with white light and no filter?
