1. Electromagnetic radiation
The many waves that surround you every second of your life.
But you wouldn’t live without them.

2. Types of electromagnetic radiation

3. Expectation 1: Definition
A form of energy that moves through space as a wave with two components; electric & magnetic. These waves oscillate at a 90o angle.

4. Expectation 2: Wave properties
From Prentice Hall publishers
Wavelength (l) – the distance between two identical successive points on a wave; unit is m
Amplitude – the distance a wave moves from the midpoint or origin; unit is m (Crest is the top of the wave & trough is the bottom of the wave)
Frequency (u) – the number of waves (or oscillations) that pass a point per second; unit is 1/s or Hz
Energy (E) – the capacity the wave has to cause change or do work; unit is Joule

5. Relationship between properties
From Prentice Hall Publishers
A long wavelength has a low frequency & low energy.
A short wavelength has a high frequency & high energy.
Amplitude does not affect wavelength, frequency or energy.
As amplitude increases intensity (brightness) increases.

6. Equations c = l/u c is the speed of light (3.0 x 108 m/s) E = hu
E represents the energy
h represents Plank’s constant & is
6.626 x J*s