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Energy
from the Sun
Learn...Microwaves
will cook your questions just right.
Microwaves
One form of travel is microwaves. Microwaves are very short
waves of electromagnetic energy that travel at the speed of
light. Microwaves are used in microwave ovens and are in the
same family of frequencies as the signals used in radio and
TV broadcasting.
Different
EMR
The arrangement of all types of electromagnetic radiation
in order of decreasing wavelength is known as the electromagnetic
spectrum. The different types of EMR differ from one another
only in their wavelengths and frequencies. The visible region
of the spectrum ranges from the longer wavelengths red light
to the shorter wavelength violet light. The range of colors
on the visible spectrum is red, orange, yellow, green, blue,
indigo, and violet. The infrared is close to the red and ultraviolet
is close to blue. Infrared Radiation is the release of energy
as electromagnetic waves in the electromagnetic spectrum just
past the red part of visible radiation.
Wavelengths
The wavelengths of infrared radiation are shorter than those
of radio waves and longer than those of light waves. They
range between approximately 10-6 and 10-3 (about 0.0004 and
0.04 in). Infrared radiation may be detected as heat, and
instruments such as bolometers are used to detect it.
Shape
of a wave
The frequency
and wavelength of light are inversely related (as wavelength
decreases, frequency increases) by the formula:
n = c/l
n = frequency in hertz (Hz)
c = speed of light (in m/s)
l = wavelength (in m)
What energy
really means
Most
people say the definition of energy is the strength you have
but there are many different defines of energy. The work done
by a constant force (F) is given by W= (F COs (theta)) s where
s= total displacement and theta= the angle between the applied
force.
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