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Light and the electromagnetic spectrum (Frequency range of the spectrum …
Light and the electromagnetic spectrum
Black body radiation :star:
A black body is an object that absorbs all the radiation that fall on it. It is a perfect absorber. A black body is also a perfect emitter of radiation.
The sun is an example of a black body
Lenses
Look in book to see how to draw ray diagrams
Look in book
Frequency range of the spectrum :rainbow:
Radio waves
100m
VHF
.
Infrared
1.01m
UHF
1m
Visible (light)
red, orange, yellow, green, blue, indigo and violet :rainbow:
Microwaves
1mm
Ultraviolet
0.0000001mm
X Rays
o.oooooo1mm
Gamma rays
0.00000001mm
Interactions of waves at material interfaces :wavy_dash:
Colour and frequency