Ch.15 Sect 1
Ch. 15 Sect 2
Ch. 15 Sect 3
Ch. 15 Sect 4
Ch. 15 Sect 5
100
These type of waves consist of changing electric and magnetic fields
Electromagnetic fields
100
Which of the following can be sensed by humans X-rays ultraviolet rays radar infrared rays
Infrared Rays
100
Rainbows are formed because
different wavelengths of light refract by different amounts
100
To send a television signal across the country, a television network can use
communications satellites
100
About how fast does it take light from the sun to reach Earth?
8 minutes
200
What can the polarizing filter indicate about light?
light can sometimes act as a wave
200
One application of ultraviolet rays is... AM radio broadcasts magnetic resonance imaging killing bacteria thermograms
killing bacteria
200
Which of the following uses a filament to produce light incandescent light bioluminescent light fluorescent lights neon lights
incandescent light
200
When an FM radio station broadcasts, the _______ of the wave remains constant
amplitude
200
Microwaves are good for heating food because...
microwaves heat food very quickly
300
All electromagnetic waves travel at the same speed, but they have different wavelengths and ______
frequencies
300
An infarared camera takes pictures called
thermograms
300
Most of the energy produced by an incandesccent bulb is given off as __________
heat
300
Fireflies produce their own light in a process called______
bioluminescence
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