TABLE 8 1 DIFFERENT TYPES OF ELECTROMAGNETIC WAVES
Type
Wavelength range
Production
Detection
Radio
> 0 1 m
Rapid  acceleration and
Receiver’s aerials
decelerations of electrons
in aerials
Microwave
0 1m to 1 mm
Klystron valve or
Point contact diodes
magnetron valve
Infra-red
1mm to 700 nm
Vibration of atoms
Thermopiles
and molecules
Bolometer, Infrared
photographic film
Light
700 nm to 400 nm
Electrons in atoms emit
The eye
light when they move from
Photocells
one energy level to a
Photographic film
lower energy level
Ultraviolet
400 nm to 1nm
Inner shell electrons in
Photocells
atoms moving from one
Photographic film
energy level  to a lower level
X-rays
1nm to 10–3 nm
X-ray tubes or inner shell
Photographic film
electrons
Geiger tubes
Ionisation chamber
Gamma rays
 <10–3 nm
Radioactive decay of the
-do-
nucleus
Rationalised 2023-24
Physics
212
SUMMARY
1