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LECTROMAGNETICWAVES

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RADIOWAVEMICROWAVEINFRARED

VISIBLELIGHTULTRAVIOLETX RAYS

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RADIOWAVE

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3.VHF(Very High Frequency)

radio wave-local radio and

wireless telecommunications.

APPLICATION1.For broadcasting and wireless

communications.

2.UHF(Ultra High Frequency)radio wave-television and

mobile phone.

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DANGER1. POTENTIAL

RISK TO HEALTH2. CAUSING MIGRAINE

3.HEADACHE

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MICROWAVE

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SOURCES1. RADAR TRANSMITTE

2. STARS

3. MICROWAVE OVEN

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APPLICATION1. SATELLITE

TRANSMISSIONS

2. RADAR SYSTEM

3. TRAFFIC

SPEED CAMERA

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DANGER1. Internal heating

of body tissue

2. Cataracts

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INFRARED

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SOURCES1. HOT OBJECTS

2. STARS

3. FLAME

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APPLICATION1. NIGHT VISION SYSTEM

2. THERMAL IMAGING

3. REMOTE CONTROLFOR TV/VCR

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4. BURGLAR ALARM

SYSTEM

5. AUTO-FOCUSING

(CAMERA)

6. DATA TRANSMISSIONTHROUGH OPTICAL

FIBRE NETWORK

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DANGER1. OVER-HEAT

2. SKIN BURNS

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VISIBLE LIGHT

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SOURCES1. HOT OBJECTS

3. STARS

2. LAMP/BULB

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APPLICATION1. VISION

2. PHOTOSYNTHESISIN PLANTS

3. PHOTOGRAPHY

4. PHOTOCELL

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DANGER1. Increase rates of

premature skin aging2. Skin cancer

3. Damage to the retina

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ULTRAVIOLET

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APPLICATION1. Detection of fake banknotes

2. Sterilisation(drinking water

and medical equipment)

3. Production of vitamin D in

human body4. Production of fluorescent

effects

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DANGER1. SKIN CANCER

2. SUNBURN

3. BLINDNESS

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X RAYS

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SOURCES1. X-RAY TUBE

2. STARS

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DANGER1. CELL DAMAGE

2. CANCER

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GAMMA RAYS

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SOURCES1. RADIOACTIVE

SUBSTANCES2. COSMIC RAYS

3. STARS

APPLICATION

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APPLICATION3. RADIOTHERAP

(CANCER TREATMENT)

2.MEDICAL IMAGING

4.STERILISATION(FOOD

AND MEDICAL EQUIPMENT)

1. PEST CONTROLIN AGRICULTURE

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DANGER

2. CELL DAMAGE

3. DNA MUTATION

1. CANCER

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THE END