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When light is refracted, which of the following does not change ?(a) Wavelength (b) Frequency(c) Velocity (d) Amplitude |
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Answer» (b) Frequency does not change on refraction EXPLANATION: When light is refracted into a medium its speed changes but the frequency remains the same because the energy associated with a photon of this light is proportional to the frequency of the light and it remains unchanged. Since the wavelength λ = c/, i.e. λ ∝ c. So the wavelength changes. Option (c) is true. |
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