Page 55 - Science Course 3 (Book 2)
P. 55
Mo10-L2a: What are Light Waves and Electromagnetic Waves?
Increasing wavelength Increasing Energy
Wavelength decreases as frequency increases. Microwaves range
from about 1 mm to
Low-frequency electromagnetic waves carry low 30 cm and are used to
amounts of energy, and high-frequency waves carry cook food, carry cell
high amounts of energy. phone signals, and
transmit information
Electromagnetic waves with shorter wavelengths by satellites.
carry more energy than those with longer wave-
lengths.
An electromagnetic wave
High Frequency Wave that has a wavelength
shorter than a microwave
Time but longer than light is
called an infrared wave.
Period
Low Frequency Wave An electromagnetic wave
that has a slightly shorter
Time wavelength and higher
frequency than light is an
ultraviolet wave.
Period
A low-frequency, low-energy Electromagnetic
electromagnetic wave that has a waves with shorter
wavelength longer than about 30 wavelengths can
cm is called a radio wave. be harmful to living
things.
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