Electromagnetic spectrum Flashcards
State the 7 electromagnetic waves found
in the electromagnetic spectrum in order
of increasing wavelength.
Gamma, X-Ray, UV, Visible, Infrared,
Microwaves, Radio
What is the highest frequency
electromagnetic wave?
Gamma waves
What is the highest energy
electromagnetic wave
Gamma waves
What is the speed of EM waves in a
vacuum?
3x10⁸ m/s
A wave transmits energy from ___
source to absorber
What range of frequencies of electromagnetic waves can be detected by the human eye
400 - 700 nM
What properties are shared by all electromagnetic waves
- They are all transverse waves
- They all travel at the same speed
- They can travel through a vacuum
State and expalin a use of radio waves
Communication, beacuse radio waves have a long wavelength and can travel long distances without losing quality
State and expalain a use of microwaves
Satellite communications and in microwaven ovens, as they pass through the ionosphere and penetrate deep into food.
State uses of infrared radiation
cooking food ( as it transfers thermal energy ), infrared cameras and short range communication
State and explain uses of visible
light
Used in fibre optics
State and explain the use of UV
Sterilisation, as it kills bacteria, energy
efficient lamps, as it radiates low heat
but high energy, and sun tanning
State and explain uses of X rays
Medical imaging and treatment, because
they are very high energy and can easily
penetrate body tissues.
State and explain uses of gamma rays
Gamma rays are used in medical
treatments, such as radiotherapy in the
treatment of cancer
How does UV radiation affect body
tissue?
-UV radiation can cause cancer when
skin is exposed to it.
-It can cause blindness if eyes are
overexposed to UV radiation.
