Electromagnetic Waves / Spectrum

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Electromagnetic Waves / Spectrum Door Mind Map: Electromagnetic Waves / Spectrum

1. Gamma Rays

1.1. Highest Energy EM waves

1.2. Short Wavelengths, 10^11m to 10^-13m

1.3. caused by

1.3.1. Radioactive decay

1.3.2. Nuclear fission

1.4. More energetic than x rays and can pass through dense concrete and metals

1.5. Very dangerous

1.5.1. can kill living cells

1.6. Can be used for medical purposes = treating cancer by killing malignant cells

2. X-Ray

2.1. emitted by most objects at very high temperatures

2.2. highly energetic form of light,not visible to human lights

2.3. Used in medicine to see inside the body

2.3.1. not invasive

2.3.2. bones visible because they are much denser than the rest of the tissue

3. Visible Light

3.1. Very small part of the entire electromagnetic specturm

3.2. Only range of energy that human eyes can detect

3.2.1. Low energy Red at about 7000A

3.2.2. High energy Violet at about 4000A

3.2.3. Allows us to see color

4. Sound Waves

4.1. Detection Of Sound

4.2. Transmission Of Sound

4.3. Determination Of The Speed Of Sound

4.4. Reflection of Sound

4.5. Pitch and Loudness

4.6. Hi

5. Ultraviolet

5.1. Wavelength Range of Ultra Violet is 4000A to 10A

5.2. Causes skin

5.2.1. Brown

5.2.2. Burn

5.3. harmful effects stopped by atmosphere shields

5.4. Used to sterilize koi ponds

6. Infra-Red Waves

6.1. Just below visible spectrum

6.2. Longer wavelength light rays (about 1.00mm to 8x10^-7m)

6.3. Molecules vibrate or resonate easily when exposed to IR radiation

6.4. emitted by

6.4.1. Sun

6.4.2. Light Bulb

6.4.3. Devices (TV remote control)

6.4.4. IR Cameras

6.4.5. IR Space telescopes

6.4.6. IR goggles

6.4.7. IR Lights

6.4.7.1. Used to examine paintings

7. Microwaves

7.1. Wavelength about 3.0cm to 1.0mm

7.2. Molecules vibrate and rotate when exposed to microwaves

7.2.1. Used to heat food

7.3. Used for communcation

7.3.1. Television Satellites And Dishes

7.3.2. Shortwave Radio Operators

7.3.2.1. Mobile Phones

8. Radiowaves

8.1. Longest Wavelength, Smallest Energy Electromagnetic Wave (energy cannot be detected without proper instruments)

8.2. Used for

8.2.1. Entertainment

8.2.2. Recreation (Remote Control Cars)

8.2.3. Communicaton

8.2.3.1. Walkie Talkies

8.2.4. Robotic systems

8.2.4.1. Land Robots

8.2.4.2. Submarines

9. General Properties

9.1. Carried by oscillating electrical and a magnetic fields.

9.1.1. Direction of wave propegation perpendicular to both fields