1. The Electromagnetic Spectrum

2. Energy and Waves
The energy that comes from the sun is called electromagnetic radiation.
This energy is carried by several waves with different wavelengths and frequencies.
Long wavelength = Low frequency
Short wavelength = High frequency
Higher frequency = more energy

5. Types of Waves Radio Waves – radio broadcasts Microwaves – cell phones
Infrared rays – heat lamps
Visible light – what we see
Ultraviolet rays – vitamin D
X-rays – view bones and teeth
Gamma rays – treat cancer
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7. Visible Light Visible, white light includes all colors of the rainbow.
ROYGBIV = red, orange, yellow, green, blue, indigo, violet.
The color of an object that we see is the color of light reflected. All other colors are absorbed.
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9. Vocabulary
Wavelength – the distance between the crest (top) of one wave and the crest of the next.
Frequency – the number of waves that pass a given point in a certain amount of time.