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Question

When monochromatic light travel from a rare to denser medium explain the following is frequency of reflected and refracted light same as incident light does decrease in speed imply a reduction in energy carried by light wave
 


Solution

(i) When light travels from a rarer to denser medium, its frequency remains unchanged. It is because, frequency is an inherent property of light.
 
(ii) Energy of light E = hν

Where, h = Plank's constant

          ν = frequency of light          
 

As the speed decreases wavelength also decreases so the frequency remains same.

Hence h and ν both are constant.

Energy remains unchanged.


Physics

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