Transcript Electromagnetic spectrum - Simon`s Electromagnetic Spectrum

Radio 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
Satellite dish
Walkie talkies
Microwaves
• 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 microwave
because they can send messages over long
distances.
Cell phones
Infrared
• Infrared waves have a wavelength between 700
nanometers and 1 millimeter
• The sun produces infrared which you feel as
heat.
sun
• Infrared also helps your night vision.
Night vision
Visible light
• Visible light's wavelength ranges from 400
nanometers to 700 nanometers
• Visible light helps us to see colors.
ROY G. BIV
• The sun produces a kind of visible light called
white light.
Sun beam
X-rays
• 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.
bones
• X-rays are also used in public security cameras
Security camera
Ultraviolet Rays
• Ultraviolet rays have a wavelength
between 60 nanometers and 400
nanometers
• Too much ultraviolet rays can cause
sunburn
lamp
sunburn
• They make lamps that use ultraviolet rays
that kill bacteria.
Gamma Rays
• Gamma rays have a wavelength of less
than .1 nanometers
• Gamma rays are used to treat some
forms of cancer
Cancer cell
• Gamma Rays are also used to kill harmful
bacteria in foods
hamburger
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