In Newton's rings, the central spot for transmitted rays will appear:
Correct answer: C. Dark
- A. White
- B. Either a or b
- C. Dark
- D. Red
Explanation
The correct option is C because In Newton's rings experiment, the central spot for transmitted rays appears dark. This is because of destructive interference between the light waves reflected from the top and bottom surfaces of the air film formed between the lens and the flat glass surface. This interference pattern creates alternating bright and dark rings, with the central spot being dark.
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Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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