Reflection Of light and Refraction at plane surface

Reflection of light and Refraction of light .

Explain reflection of light at a plane surface with the help of a neat ray diagram.

Assertion:- Images formed by TIR (Total internal reflection) are much brighter than formed by mirrors or lenses. Reason:- IN TIR, there is no loss of intensity while in case of reflection from mirrors or refraction from plane surfaces or lenses there is some loss of intensity as all light can never be reflected or refracted.

Unpolarised light is incident from air on a plane surface of a meterial of refractive index 'mu' . At a particular angle of incidence 'I' , it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation?

Monochromatic light of wavelength 589nm is incident from air on a water surface. Given, refractive index of water is 1.33. Which of the following statement(s) is/are correct? I. Frequency of reflected light and refracted light are same. II. Wavelength of reflected light is more than that of refracted light. III. Speed of reflected light is equal to that of refracted light. IV. Intensity of reflected light is always more than that of refracted light.

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