Modified True/False
Indicate
whether the statement is true or false. If false, change the identified
word or phrase to make the statement true.
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1. |
An
opaque object does not allow light to pass through it. ____________________
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2. |
A
holograph is a three-dimensional image created using interference
of light. ____________________
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3. |
A
network of 12 satellites forms the Global Positioning System.
____________________
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4. |
The
speed of light to three significant digits is 3.00 ´ 106 m/s.
____________________
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5. |
A
diverging mirror, such as a store security mirror, has a convex
shape. ____________________
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6. |
The
ratio of the sine of the angle of refraction to the sine of the
angle of incidence is constant and is equal to the index of refraction.
____________________
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7. |
Energy waves within the electromagnetic spectrum obey the universal
wave equation, c=fl. ____________________
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8. |
Diffuse reflection occurs from a smooth, shiny surface.
____________________
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9. |
A
converging mirror offers a much wider field of view due to its
concave shape.
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10. |
As
light travels from an optically dense medium into an optically less
dense medium, it speeds up and bends away from the normal. ____________________
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Multiple Choice
Identify
the letter of the choice that best completes the statement or answers
the question.
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11. |
Which
colour is not part of the visible spectrum?
a. |
red |
c. |
blue |
b. |
grey |
d. |
yellow |
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12. |
The
EM spectrum consists of
a. |
radio waves |
c. |
gamma rays |
b. |
UV
radiation |
d. |
all
of the above |
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13. |
A
light ray reflects off a mirror. The angle of reflection is 55°.
What was the angle of incidence?
a. |
35° |
c. |
55° |
b. |
45° |
d. |
none of the above |
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14. |
Which
of the following is not an application of total internal reflection?
a. |
fibre
optics |
c. |
lasers |
b. |
prism binoculars |
d. |
bicycle reflectors |
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15. |
When
light travels from air into a block of glass at an angle of 47°
to the normal,
a. |
it
refracts away from the normal. |
c. |
it
refracts toward the normal. |
b. |
it does not refract. |
d. |
none of the above |
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16. |
Light
travels through a medium at a speed of 2.15 ´ 108 m/s. Which of the following
is the index of refraction of the medium?
a. |
1.40 |
c. |
1.30 |
b. |
1.33 |
d. |
1.27 |
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17. |
Electromagnetic waves
a. |
have much higher frequencies than sound
waves. |
b. |
can travel through a vacuum. |
c. |
are
a small portion of the visible spectrum of light. |
d. |
two of the above |
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18. |
Which
of the following properties are not exhibited by electromagnetic waves?
a. |
magnetism |
c. |
refraction |
b. |
diffraction |
d. |
interference |
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19. |
A
diverging mirror
a. |
has
a concave shape. |
b. |
gives a wide field of view. |
c. |
can
be used to focus incoming light to a single point. |
d. |
does not obey the laws of reflection due
to its curvature. |
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20. |
A
substance with a higher index of refraction than another
a. |
has
a larger critical angle. |
b. |
allows the light to travel at a higher speed. |
c. |
causes light to refract more when it enters
the medium. |
d. |
all of the above |
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21. |
A
laser, whose name is derived from light amplification by the stimulated
emission of radiation,
a. |
can
be used to cut through metals very quickly and cleanly. |
b. |
is
very dangerous and should never be used in classroom demonstrations. |
c. |
is
used in digital cameras to convert light energy into electrical
energy. |
d. |
produces
light which is outside the visible spectrum. |
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22. |
A
substance has an index of refraction of 1.90. The critical angle for
this substance in air is
a. |
less
that that of water |
c. |
0.554° |
b. |
90.0° |
d. |
31.8° |
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