Em Waves

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Em Waves

Has a wavelength in a range from about 380 or 400 nanometers to about 760 or 780 nm, with a frequency range of about 405 THz to 790 THz.

USESUse to see things, and in films

RISKSThey can cause burns, skin irritation, dehydration, low blood pressure, eye damage and overheating. A form of heat radiation, infrared waves are most dangerous at high levels.

RISKSX-Rays can cause cell damage and cancers. Overexposure may lead to cancer such as leukemia.

USESUsed in medical application and in inspecting welds, crystallography, astrophysics, remote sensing. Lower energy X-Rays don't pass through tissues as easily, and can be used to scan soft areas such as the brain.

Have a wavelength in the range of 0.01 to 10 nanometers and frequencies in the range 30 petahertz to 30 exahertz (3 × 10^16 Hz to 3 × 10^19 Hz)


EM Waves

RISKSLarge doses of radio waves are believed to cause cancer, leukaemia and other disorders.

USESTransmit radio and television signal, mobile phones, magnetic resonance imaging

Radio waves have the lowest frequencies < 3 x 10^9 and the longest wavelength > 1 x 10^-1.


USESUsed in telecommunication such as mobile phones, used by fixed traffic speed camera, in cooking, radar to determine the range, altitude, direction or speed and in terrain mapping and used in weather formation

RISKSProlonged exposure to microwaves is known to cause "cataracts" in your eyes and preventing you from seeing clearly. Recent research indicates that microwaves from mobile phones can affect parts of your brain.

Extremely high frequency radio waves, have frequencies (Hz) 3 x 10^9 to 3 x 10^10 and have very short wavelengths ranging from approximately one millimeter to 30 centimeters. Stars also give off microwaves.


USESHeating and drying, night-vision cameras, remote controls and satellite remote sensing

Wavelength longer than visible light, measured from the nominal edge of visible red light at 0.7mm and extending to 300mm and includes most of the thermal radiation emitted by object.Have frequencies 3 x 10^11 to 4 x 10^14.




A wavelength from 400 nm to 10 nm, shorter than that of visible light but longer than X-rays and frequencies from 750 THz to 30 PHz. Ultraviolet radiation is produced by high-temperature surfaces such as the sun. It is absorbed by oxyen in the Earth's atmosphere, which forms the ozone layer.


They are extremely high frequency waves, and carry a large amount of energy. They have frequencies above 10 exahertz (or >1019 Hz), and wavelengths less than 10 picometers (less than the diameter of an atom).


Used to prevent counterfeiters, also useful in crime scenes, used in photochemicals, photoelectric effects and in hardening casts in medicine.Hospitals use UV lamps to sterilise surgical equipment and the air in operating theatres.Food and drug companies also use UV lamps to sterilise their products.Suitable doses of Ultraviolet rays cause the body to produce vitamin D, and this is used by doctors to treat vitamin D deficiency and some skin disorders.

USESUsed in nuclear research, geophysics, mineral exploration. They are also used in many medical applications. Images of our universe taken in gamma rays have yielded important information on the life and death of stars, and other violent processes in the universe. They are also used to kill cancer cells without having to resort to difficult surgery.

RISKSToo much exposure may lead to skin cancer, melanoma and eye problems such as photokeratitis or sunburn of the cornea.Large doses of UV can damage the retina in your eyes

RISKSToo much light can damage the retina in your eye.

RISKSGamma rays cause cell damage and can cause a variety of cancers.They cause mutations in growing tissues, so unborn babies are vulnerable.


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