1. Warm-up
Example 3 from Practice Atomic Mass notes on pg 31!

2. Intro to the Electromagnetic Spectrum

3. EM Spectrum Video Examples of… Radio: Microwaves: Infrared: Visible:
Ultraviolet:
X-rays:
Gamma rays:

5. Properties of Light Light travels as a wave
Light travels at the speed of light
3.00x108 m/s
Visible light is a very small part of the EMR spectrum
Violet light has the most energy. Red light has the least energy.

6. EM Vocab Wavelength: symbol is λ Measured in distance, meters (m)
Distance between two adjacent peaks
Measured in distance, meters (m)
Frequency: symbol is ν
Number of peaks that pass a given point per second
Measured in Hertz (1/sec), Hz
Energy: symbol is E
Measured in Joules (J)

7. Gamma Rays v. Radio Waves
Short Wavelength
High frequency
High energy
Travel at Speed of Light
Radio Waves:
Long Wavelength
Low frequency
Low energy