Please enable JavaScript.
Coggle requires JavaScript to display documents.
High Frequency Radiation - Coggle Diagram
High Frequency Radiation
Definition
Has shorter wavelengths then visible light.
from one ten-thousandth of a millimetre to one-hundred billionth of a metre.
Really tiny waves that can penetrate cells in your body
Ultraviolet
Radiation with a higher frequency then visible light.
Sunlight contains UV light
Your body needs some exposure to UV light to produce vitamin D
You cannot see UV light
Can cause skin cancers like melanoma
Some objects fluoresce (glow) when hit by UV light.
This is because they absorb the energy from the UV light and emit visible light.
UV light is used to sterilise objects
X-Rays
Have great penetrating power
This mean they can be used to investigate the structure of objects and fins flaws in metals
Can damage cells and tissues and also effect the genetic material inside cells.
X-rays are produced when electrons hit a metal surface.
Used in Radiology to produce images of bones
Used in radiotherapy to target cancer cells to kill them or stop them from multiplying.
Gamma Rays
Have a wavelength of about one-hundred-billionth of a metre
Only a thick sheet pf lead or a concrete wall can stop them.
Produced by radioactive materials, nuclear power plants and nuclear bombs.
Can be detected by photographic films or a machine called the Geiger counter
Can turn atoms into ions by causing them to release electrons
This ionising ability of gamma rays is used in radiotherapy to target and kill cancer cells
Useful in medical diagnosis
PET machine