-Light known to be polarized in the horizontal direction is incident on a polari
ID: 1511148 • Letter: #
Question
-Light known to be polarized in the horizontal direction is incident on a polarizing sheet. It is observed that only 15 percent of the intensity of the incident light is transmitted through the sheet. What angle does the transmission axis of the sheet make with the horizontal? (III was incorrect when I did it)
Question options:
21º
67º
8.6º
23º
81º
-A ray of light is shown being reflected at the surface of a material. If the reflected ray is completely plane polarized, the index of refraction of the material is approximately (II was incorrect when I did it)
Question options:
0.63
0.80
1.8
1.3
1.9
-A phase shift of 180º occurs when a light wave (IV was incorrect when I did it)
Question options:
is transmitted through a boundary surface into a medium that is more dense than the medium from which the wave came.
is transmitted through a boundary surface into a medium that is less dense than the medium from which the wave came.
reflects from the boundary surface of a medium that is more dense than the medium in which the wave is traveling.
reflects from the boundary surface of a medium that is less dense than the medium in which the wave is traveling.
-Which, if any, of the following conditions is not necessary for the light waves from two sources to be coherent?(V was incorrect when I did it)
Question options:
They must have a constant phase difference.
They must have the same amplitude.
They must have the same wavelength.
They must have the same frequency.
V)
All of these conditions are necessary.
Please answer all parts, there are 4 of them and show what is the final answer in each part!!
I)21º
II)67º
III)8.6º
IV)23º
V)81º
Explanation / Answer
1) Here, I = Io * cos2(theta)
=> 0.15 = cos2(theta)
=> theta = 67º
=> option II) is correct .
2) index of refraction of the material = tan(53)
= 1.3
=> option IV) is correct .
3) is transmitted through a boundary surface into a medium that is more dense than the medium from which the wave came.
4) They must have the same amplitude.
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