Electromagnetic waves

1. colors

1.1. red

1.2. orange

1.3. yellow

1.4. green

1.5. indigo

1.6. violet

2. radiowaves

2.1. longest wave lengths and shortest frequency

2.2. uses:radio,tv broadcast,remote control

3. infra-red waves

3.1. heat waves 1mm to 8(10-7)m

3.2. uses: thermal images,night vision

4. ultraviolet

4.1. 4000 to 10A wavelength

4.2. harmful to skin.disinfectant and sanitizer

5. x-ray

5.1. high freq. and high penetrating. high energy

5.2. for medicinal use

6. gamma rays

6.1. highest energy

6.2. medicinal purpose and nuclear reactions

7. visible light

7.1. red light at low freq. violet light at high freq.

7.2. makes the world visible to us

8. microwaves

8.1. misnomer 3cm to 1 mm

8.2. heating,communication