question_answer 1)

Monochromatic light of wavelength 589 nmis incident from air on a water surface. Whatare the wavelength, frequency and speed ofreflected, and (b) refracted light ? Refractive index of water is 1'33.  

Answer:

(a) For reflected light wavelength isunchanged i.e. Frequency (b) For refracted light, while moving fromone medium to the other, frequencyremains unchanged. frequency of refractive light is Also,   and