The British physicist Thomas Young explained the interference of light using the…
Physics · Class 12 · CBSE — Wave Optics
The British physicist Thomas Young explained the interference of light using the principle of superposition of waves. He observed the interference pattern on the screen, in his experimental set-up, known now as Young's double slit experiment. The two slits S1 and S2 were illuminated by light from a slit S. The interference pattern consists of dark and bright bands of light. Such bands are called fringes. The distance between two consecutive bright and dark fringes is called fringe width.
If the screen is moved closer to the plane of slits S1 and S2, then the fringe width:
- will decrease, but the intensity of bright fringe remains the same.
- will increase, but the intensity of bright fringe decreases.
- will decrease, but the intensity of bright fringe increases.
- and the intensity both remain the same.
Answer
(A) will decrease, but the intensity of bright fringe remains the same.
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