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In case of refraction of light

1. Frequency changes
2. Speed changes
3. Wavelength changes A . a is correct B. b and c are correct \( c . a, b, c \) are correct
4. a and b are correct

Correct answer: a and b are correct

Solution

During refraction, the light enters a medium with a different refractive index, so its speed changes. The frequency remains unchanged, and because v = fλ, a change in speed with constant frequency means the wavelength changes too; therefore the correct choice is the one stating frequency and speed change.

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