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A
B C
D E
F G
H I
J K
L M
N O
P Q
R S
T U
V W
X Y
Z
W
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Wave:
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A vibration in some media, which transfers
energy from one place to another. Sound waves
are vibrations transitory in air. Light waves
are vibrations in electromagnetic fields.
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Wavelength:
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The distance linking two wave crests. Radio
waves could have lengths of several feet;
the wavelengths of X-rays are approximately
the size of atoms.
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White Dwarf Star:
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The hot, dense remains of a low-mass star
like our Sun that has tired its sources of
fuel for thermonuclear fusion. White dwarf
stars are usually about the size of the Earth.
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