uses and dangers of electromagnetic waves igcse
What is a main danger of ultraviolet radiation?
Skin cancer
Which wave is used for sterilizing water and sun tanning?
Ultraviolet rays
What is a primary use of gamma rays besides sterilizing medical equipment?
Cancer treatment
What is a primary danger associated with microwaves?
Internal heating of body tissues
What is a primary use of X-rays besides medical imaging?
Security scanners
What is a main danger of Ultraviolet waves?
Skin cancer risk
Which wave is primarily used for remote controls and night vision?
Infrared radiation
Which wave type has no known dangers according to the table?
Radio waves
Besides remote controls, what is another primary use for infrared waves?
Heating devices
What is the main danger associated with gamma rays?
Cancer
Which wave type is primarily used for broadcasting?
Radio waves
Which wave is used for sterilizing medical equipment and cancer treatment?
Gamma ray therapy
Which wave type is primarily used for medical imaging?
X-ray radiation
Which wave type is used for both vision and photography?
Visible light
What is a main danger associated with X-rays?
Cellular mutation
What is the main danger of infrared radiation?
Skin burns
What is a primary danger of gamma rays?
Cellular death
What is one primary danger of X-rays?
Cancer
What is a use for ultraviolet waves that involves identification?
Security marking
What is a primary use of visible light besides vision?
Photography
Besides sterilizing water, what is another primary use for ultraviolet waves?
Sun tanning
What is a main danger of intense visible light?
Damage the retina
The primary danger of visible light is related to damage to which body part?
Eye's retina
What is one primary use of Radio waves besides broadcasting?
Satellite communication
What is the primary danger associated with microwave radiation?
Internal heating of body tissues
The change in observed frequency and wavelength of a wave when its source moves relative to an observer is known as what phenomenon?
The Doppler effect
When a wave source moves away from an observer, how is the observed wavelength affected?
Longer wavelength
As a source of waves approaches an observer, what happens to the observed frequency?
Higher frequency