Thermal emissions from the lava cause an
increase in the frequency of light surrounding the
flow. Light maintains the same wave-speed,
regardless of frequency. Therefore, we know
that the wavelength is indirectly proportional
to the frequency, and that is the frequency
is increased, the wavelength decreases.
For a certain temperature, the frequency and
wavelength will be modified to corresponding
values. We know that the visible spectrum can be
broken down into colors, each with unique
wavelengths. The wavelength of red is from
622-780 nanometers.Therefore, the lava
glows red when the temperature is increased to
where the frequency is between 482 and 384
THz. As the frequency is increased, the
wavelength would decrease. So, theoretically,
***really*** hot lava would look orange, yellow,
green, blue and violet!! The lava is
termed a 'black body radiator.' Ask your
teacher what that is.
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