Electromagnetic Radiation

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Electromagnetic Radiation by Mind Map: Electromagnetic Radiation

1. Electromagnetic Waves

1.1. The speed of all waves travel at 3X10^8 m/s

1.2. Wavelength is equal to the speed of light divided by its frequency

1.2.1. Shortest wavelength= gamma rays and the longest wavelength = radio waves

1.3. Propagation is the way in waves travel

1.4. Frequency= the number of waves per unit time

2. Representations

2.1. Ray= narrow beam of particles

2.2. Particle= matter that makes up electromagnetic waves

2.3. Wave Packet= short bursts of waves that also travel together

2.4. Wave Front = occurs when waves have the same phase

3. Reflection= the angle at which a wave is on a surface is the same angle at which is being reflected

4. Refraction= when the speed of a wave changes direction. Ex. when a wave goes through one substance to anoher

5. Dispersion= occurs when a waves velocity is not uniform; it is dependent on frequency

6. Diffraction occurs when a wave runs into something; the wave begins to bend and move around the object

7. Spectrum (band) Example

7.1. Largest= Radio

7.2. Microwave

7.3. Infrared

7.4. Visble

7.5. Ultraviolet

7.6. Xray

7.7. Smallest =Gamma Ray

8. Interference occurs when two or more waves come together and create a new wave pattern

9. Polarization= the orientation of a waves electric field at a point in its ossillation

10. Absorption= the way in which energy is taken up by other matter

11. Scattering occurs when something in a particular medium makes a deviate from a straight trajectory or path

12. Transparent= ability for light pass through something

12.1. Translucent= allows light to diffuse as it passes through

12.2. Opaque- the amount of light which is blocked

13. Fluorescence-emission of light from an electromagnetic wave

14. Phosphorescence= a substance that does not readmit radiation from which it has previously observed