IGNOU PHE 9 2016 - 4. A vertical single and double slits and illuminated by a point sourc

Question

4. A vertical single and double slits and illuminated by a point source. Discuss the salient features of their Fraunhofer diffraction patterns. Also, obtain an expression for intensity distribution in case of double slit.

13 Nov 2017

Answer :

Word Count : 321

1. Single Slit Diffraction:
- Pattern Characteristics: When a single slit is illuminated by a point source, it produces a diffraction pattern characterized by a central bright maximum surrounded by alternating bright and dark fringes.
- Central Maximum: The central maximum is the brightest, and the intensity decreases as you move away from the center.
- Width of Fringes: The fringes become less intense and broader as the distance from the central maximum increases.
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