THE ELECTROMAGNETIC SPECTRUM

THE ELECTROMAGNETIC SPECTRUM

1. RADIO-WAVES

   • Longest wavelength & Lower frequency.
   • USES : MRI scanners & Astronomy.

2. MICROWAVES

   • Wavelength: 10 cm
   • USES: Cooking, Mobile phone communication, Satellite television & Astronomy-finding.
   • DANGERS: Internal heating & Body heat up.

3. INFRA-RED RADIATION

   • They are emitted by all objects. the hotter it is, the more infra-red radiation is emitted.
   • USES: Cooking, Remote control, Communication systems, Detect intruders with burglar alarms, Nightvision & Astronomy.

4. VISIBLE LIGHT

   • Red, Orange, Yellow,Green, Blue, Indigo, Violet

5. ULTRA-VIOLET

6. GAMMA RAYS

7. X-RAYS