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# 28. Three flat layers of transparent material are stacked upon one another. The to]: layer has index of reection in, the middle has "'2, and the

Hi, I just need help understanding these 5 multiple choice questions, can you also show your work!

All problems except 29.

28. Three flat layers of transparent material are stacked upon one another. The to]: layer has index of
reﬂection in, the middle has ”‘2, and the bottom one has H3. If m 1':- Hz 3=- :13, and ifa ray oflight strikes the top layer at an angle ofincidenee 9:. = 30', in which layer is the angle of' refraction the greatest?
a I[Illnce the ray enters the touching layers, the angle of refraction remains constant. b. the top layer
c. the middle layer
d. the bottom layer 29. A liquid has an index of refraction of 1.33. What is the speed oflight through it? (c = 3.00 x ll}at rnfs]
a. 3.99 3-: news c. 4.46 x lﬂE‘mIs
b. 2.215 x 10* ms cl. 2.04 x 10* mo 30. A ray of light strikes a thick sheet of glass [it = [.5] at an angle of4ﬁ‘“ with the normal. Find the angle of
the refracted ray within the glass with respect to the normal.
3. 25&quot; c. 29“
h. 56&quot; d. [6&quot; 31. A monochromatic beam of light in air has a wavelength of 632 nm. It passes through glass {it = 1.52] and
then through carbon disulﬁde [n = LIES]. What is its wavelength in the carbon disulﬁde?
a. 361 nm c. 895 nm
b. 960 nrn d. 333 nm 32. A light my in air is incident on an air-to-glass boundary at an angle of 30.0“ and is refracted in the glass
at an angle of [6.7'“ with the normal. Find the index of refraction of the glass.
a 1.3&quot;4 c. [.23
b. 1.40 d. 2. [3 33. If' the speed oflight through an unknown liquid is measured at 1.6? x it]E mfs, what is the index of
reﬂection ofthis liquid? [c = 3.00 x 10* mix}
a. 1.80 c. “.60“
b. LIST tl. LEG

SOLUTION: 28 answer is (b) - top layer. the reason is by Snell's law, s s the  angle  of incidence ... View the full answer

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