Radio WavesRadio Waves• Radio waves have the longest wavelength

which is longer than 30 centimeters

• All radios and televisions use radio waves.

• Radio waves are also used in walkie talkies

Walkie talkies

Satellite dish

• Microwaves have a wavelength between 1 millimeter and 30 centimeters.

• Microwaves (obviously) are used for microwave ovens. (gasp!)

• Microwaves are also used in cell phones because they can send messages over long distances.

Cell phones

microwave

• Infrared waves have a wavelength between 700 nanometers and 1 millimeter

• The sun produces infrared which you feel as heat.

• Infrared also helps your night vision.

Night vision

sun

• Visible light's wavelength ranges from 400 nanometers to 700 nanometers

• Visible light helps us to see colors.

• The sun produces a kind of visible light called white light.

ROY G. BIV

Sun beam

• X-rays have a wavelength ranging between .001 nanometers and 600 nanometers

• X-rays are used to take pictures of your bones because they can go through skin and muscles but not bones.

• X-rays are also used in public security cameras

Security camera

bones

• Ultraviolet rays have a wavelength between 60 nanometers and 400 nanometers

• Too much ultraviolet rays can cause sunburn

• They make lamps that use ultraviolet rays that kill bacteria.

sunburn

lamp

Gamma Rays

• Gamma rays have a wavelength of less than .1 nanometers

• Gamma rays are used to treat some forms of cancer

• Gamma Rays are also used to kill harmful bacteria in foods

Cancer cell

hamburger

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