A light ray is reflected off the surface of a plane mirror at 40 to the normal. What is the angle of reflection of the reflected ray?
0%
30o
43%
40o
57%
50o
0%
60o
Q.2.
What determines how fast light travels in a medium?
33%
Size of the medium
0%
Shape of the medium
67%
Refractive index of the medium
0%
Color of the medium
Q.3.
What equation can be used to calculate the refractive index of a substance?
67%
Refractive index = 1 x sin c
33%
Refractive index = 1 / sin c
0%
Refractive index = 1 – sin c
0%
Refractive index = 2 / sin c
Q.4.
The critical angle of diamond is 24 degrees. What is its refractive index?
67%
0.6
0%
4.9
33%
2.4
0%
0.4
Q.5.
Another equation for calculating the refractive index of a substance is ...
67%
Refractive index = sin i x sin r
0%
Refractive index = sin r / sin i
33%
Refractive index = sin c / sin r
0%
Refractive index = sin i / sin r
Q.6.
If light enters a medium with an angle of incidence of 23 degrees and has an angle of refraction of 18 degrees, what is the refractive index of the medium?
50%
0.12
50%
1.3
0%
0.8
0%
0.7
Q.7.
If a shiny surface is not smooth, what will happen to light rays incident upon it?
0%
They will be reflected in numerous directions
50%
They will be reflected towards one point
0%
They will pass straight through the material
50%
The light will be absorbed by the material
Q.8.
When a light ray travels from air into glass, what can you say about the size of the angle of refraction compared to the angle of incidence?
100%
It is bigger
0%
It is the same
0%
It is smaller
0%
It is zero
Q.9.
What direction does the incident ray bend when traveling from glass to air?
50%
Towards the normal
50%
Towards the glass
0%
Towards the sea
0%
Away from the normal
Q.10.
Which of the following can reflect light?
0%
Mirror
50%
Water
0%
Glass
50%
All of the above
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