The index following of refraction of diamond is 2.4. The index of refraction of

Question

The index following of refraction of diamond is 2.4. The index of refraction of glass is 1.66. Which of the following statements is true? a. The wavelength of a given light wave in glass is the same as its wavelength in diamond. b. Light travels faster in diamond than it does in glass. c. The frequency of a given light wave is the same in glass as it is in diamond. d. The speed of a given light wave is the same in glass as it is in diamond. e. When light goes from glass to diamond, it will totally reflect back into the glass. A thin layer of glucose solution (n = 1.38) is sandwiched between two flat, parallel plates of glass (n = 1.50). What must be the minimum thickness of the glucose solution layer if normally incident light with lambda = 509 nm in air is to be strongly (i.e., constructively) reflected? Only consider reflection from the surfaces of the glucose solution layer. a. 184 nm b. 170 nm c. 92.2 nm d. 277 nm e. 84.8 nm

Explanation / Answer

25.)

correct option are:

C. frequency of light remains same

D.) speed of light remains same

wavelength of light will decreases if light goes from lower to higher refractive index

26.)

The minimum thickness (t) for a path diff. of ½ wave is given by .
2 t = ½

t = ¼( / n)

t = (509 nm) / (4*1.5)

t= 84.8 nm

option E is correct

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