refraction of certain materials A) depends on the Brewster angle B) depends on t
ID: 306359 • Letter: R
Question
refraction of certain materials A) depends on the Brewster angle B) depends on the wavelength of light. C) depends on the angle of incidence. D) depends on the intensity of light. E) depends on the polarization of light. 11. White light enters a glass prism, but the color components of the light are observed to emerge from the prism. Which one of the following statements best explains this observation? A) The separation of white light into its color components is due to the increase in the speed of light within the glass. B) Some of the color components of the white light are absorbed by the glass and only the remaining components are observed. C) The index of refraction of the glass depends on the wavelength, so the color components are refracted at different angles. D) Only some of the color components are refracted by the glass; and these are the ones that are observed. E) White light is separated into its color components by total internal reflection within the prism. For questions 12. 13) A beam of light that consists of a mixture of red. green and violet light strikes a prism (surrounded by air) as shown. Indices of refraction for this prism for the various colors are indicated in the table. An observer is located to the right of the prism as shown. Incident beann 45 45 / 45 celor red green 1.43 1.40 violet 1.37 12. Which color(s) could, in principle, be seen by the observer? A) only red light B) only green light C) only violet light D) only green and red light E) only green and violet light 13. Which physical phenomenon is illustrated by the fact that the observer will not see all three colors of light? A) Doppler effect B) dispersionExplanation / Answer
11) (C) the index of refraction of glass depends on the wavelength, so the color components are refracted at different angles.
12) (A) only red light
Green and violet light are totally internally reflected as their critical angle is more than 45 degrees.
critical angle is given by: th = arcsin(1/n)
For red, it is less than 45 degrees and for violet and green it is greater than 45 degrees.
13) All options are not given but the answer is total internal reflection.
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