When light is refracted, which of the following does not change?
(a) Wavelength
(b) Frequency
(c) Velocity
(d) Amplitude

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Solution

(b) Frequency

Frequency of a light wave doesn't change on changing the medium of propagation of light.

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When we change a feeble sound to a loud sound, we increase its :

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(b) amplitude

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Question 5
When we change feeble sound to loud sound we increase its

(a) frequency
(b) amplitude
(c) velocity
(d) wavelength

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