av Vivien Tay 12 år siden
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Mer som dette
Ionising radiation is encountered in cosmic rays which originate form space and the Sun. They also can be produced artificially using X-rays.
The damage it does to the body: 1)Damage to proteins, nucleic acids and other vital molecules found in cells. 2)Damage to chromosomes. 3)A pregnant woman risks giving birth to a deformed baby. 4)Risks of getting cancers like leukaemia. 5)Premature aging and shortening of lifespan.
High energy electromagnetic waves like UV rays and X-rays are able to ionise atoms and molecules.
Our skins absorb the infrared waves which make us feel warm. The source of this heat can be seen like the red colour of a hot charcoal.
able to go around without any obstructions due to their longer wavelengths
used in radio broadcasting, wireless telegraphy, telecommunications etc.
Satellite television use microwaves to receive TV programmes
unable to go around without any obstructions due to their shorter wavelengths
causes water molecules in food to vibrate at millions times per second and creates friction to heat up the food
can penetrate haze, light, rain, snow, clouds and smoke
Amount of infrared energy emitted by a human body depends on its temperature
infrared remote controllers used to control many electrical devices like TV
used in opitical fibres for telecommunications
light is used in opitical fibres for medicial purposes
divided into three bands:
UVB and UVC rays
used as germicidal lamps for sterilisation in hospitals
UVA rays
UV lamps emit UVA are used in sunbeds for artificial tanning
UV rays are part of the sunlight that causes sunburn and tans
can also be used in daily applications like X-rays scanner at airports
used to produce X-ray images for doctors to diagnose the fracture of a broken arm etc.
can also be used for radiation therapy
y-rays used to destroy brain tumor
uses to treat cancer
high energy rays
