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 frequencyShort wavelength = High frequency

Higher frequency = more energy

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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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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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.