Reactor E566 heat lamp
the Reactor E566 heat lamp emitted infrared radiation as well as red light
The frequency of a photon is proportional
to the amount of released energy while
the wavelength is inversely proportional,
all according the relation E = hf =
hc/λ known as Planck's law. The
product hc is a constant so by increasing
levels of energy the wavelength of the
emitted radiation will become shorter and
after passing the short wave infrared
area it finally will turn into red. This is the
point from where a solid like Kanthal
would start emitting red light in addition to
an already substantial amount of infrared
radiation, as can be seen with the
Reactor E566 heat lamp on display here. Red-glowing elements emitted a greater
amount of (for medical purposes desired) short wave infrared radiation than dull
radiators but most of the emitted infrared radiation was still of the long wave type.