 Refraction and Reflection Basics
2 years ago
thephysicsgrove
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• Question 1
30 seconds Q. How does light behave as it enters these mediums?
continue its path as straight line.
bends toward the normal
bends away from the normal
reflects
• Question 2
30 seconds
Q. According to Snell's Law, light passing from air to glass will cause the light to
maintain its original speed
accelerate while it is in glass
increase its speed
reduce its speed
• Question 3
45 seconds
Q.

The velocity of light in vacuum is _______ m/s

3x108

3x1012

3x106

3x1010

• Question 4
30 seconds
Q. Absolute refractive index of any medium is always _______.
less than 1
greater than 1
1
0
• Question 5
30 seconds
Q. The formula to calculate the refractive index using speeds of light is
n=cv
n=v/c
n=c/v
v=nc
• Question 6
30 seconds
Q. The formula to calculate the refractive index using angles in the different mediums is
n = (sin i)(sin r)
n = (sin i) / (sin r)
n = (sin c) / (sin v)
n = sin (i/r)
• Question 7
30 seconds
Q. Swimming pools and the ocean look shallower than they really are due to:
reflection
dispersion
refraction
total internal reflection
• Question 8
30 seconds
Q. If a pulse of red light and a pulse of blue light travel in vacuum
The red pulse travels faster because its index of refraction is smaller
The blue pulse travels faster
The two pulses travel at the same speed
The relative speed depends on the exact wavelengths of the red and blue pulses
• Question 9
30 seconds
Q. A light ray hits a plane mirror surface at 20 degrees to the normal. What is the angle between the incident ray and the reflected ray?
20o
40o
70o
30o
• Question 10
30 seconds
Q. The formula for total internal reflection is