Wave Theory, Wavefronts & Doppler Effect
The rays of different colours fail to converge at a point after passing through a thick converging lens. This defect is called
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Answer: (d)
- Refractive index of glass depends on wavelength (), so focal length differs for each colour.
- Violet focuses closer to the lens than red, so the colours do not meet at one point.
- This defect is chromatic aberration, so the answer is (d).