Term
| states that the angle of reflection is equal to the angle of incidence |
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Definition
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| is a material having free having free charged particles that easily flow through it when an electric force acts on them |
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Definition
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Term
material is one through which light can pass in
straight lines. |
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Definition
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Term
| of a wave is the distance between successive troughs. |
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Definition
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Term
is a region of reduced pressure of the medium through
which a longitudinal wave travels. |
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Definition
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Term
primary colors are the three colors - red, blue, and
green - that, when added in certain proportions, produce any other color in the
visiblelight part of the electromagnetic spectrum. |
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Definition
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Term
wave is one in which the medium vibrates in a direction
parallel to the direction in which the wave travels. |
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Definition
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Term
states that an electric field is created in any region of
space iri which a magnetic field is changing with time. |
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Term
is a partial shadow that appears where some but not
all of tlie light is blocked |
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Term
is a magnet whose field is produced by an electric
current. |
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Definition
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Term
| the lowest part of a wave |
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Definition
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Term
| distance between successive crests , troughs, or identical parts of the wave |
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Definition
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Term
| for a wave or vibration, the maximum displacement on either side of the equilibrium position |
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Definition
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Term
A butterfly at eye level is 20 cm in front of a plane mirror. you are behind the butterfly, 50 cm from the mirror. What is the distance between your eye and the image of the
butterfly" in the mirror? |
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Definition
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Term
A weight suspended from a spring is seen to bob up and dovm over a distance of 20 cm
twice each second.
(a) What is its frpquency?
(b) What is its ptiriod?
(c) What is its amplitude? |
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Definition
a. f=2Hz
b. T= 0.5 s
c. A= 10 cm |
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Term
How long does it take for a pulse of laser light to reach the Moon and to bounce back
to the Earth? |
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Definition
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Term
How much more intense than the threshold of hearing is a sound of
(a) 10 dB?
(b) 30 dB?
(c) 60 dB? |
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Definition
a. 10
b. 10 x 10 x 10 = 1,000
c. 10 x 10 x 10 x 10 x 10 x 10 = 1,000,000 |
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