Which of the following properties does NOT change in phenomenon of refraction?

Speed

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Frequency

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Wavelength

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Direction

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Intensity

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Solution

The correct option is B Frequency
When light passes from one medium to another medium via refraction, then the frequency of the light remains the same but its velocity, intensity as well as wavelength changes.
The direction of propagation also changes. If the light travels from rarer to denser medium, then it slightly bends towards the normal while from denser to rarer, it bends away from the normal.

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