The Beautiful World of The Beautiful World of LIGHT!!LIGHT!!

SpectrumSpectrum

• The amount of light we can see The amount of light we can see is a very small portion of all is a very small portion of all light.light.

• All light (what we can and All light (what we can and cannot see) makes up the cannot see) makes up the electromagnetic spectrum.electromagnetic spectrum.

• Electromagnetic wave is a fancy Electromagnetic wave is a fancy way of saying light waves.way of saying light waves.

Did You Know?• If the electromagnetic spectrum was a window 30 million kilometres long, we would only have to open it three centimeters to let in only the visible light?

The SpectrumThe Spectrum

The SpectrumThe Spectrum

• Electromagnetic waves are Electromagnetic waves are transverse waves.transverse waves.

• Electromagnetic waves do not Electromagnetic waves do not need a medium, they can need a medium, they can travel through the vacuum of travel through the vacuum of space.space.

Radio WavesRadio Waves

• Radio waves are light waves.Radio waves are light waves.

• Radio waves have the longest Radio waves have the longest wavelength of all light wavelength of all light waves.waves.

Radio Waves• Radio waves have a big range Radio waves have a big range of wavelengths, some are of wavelengths, some are bigger than a football field, bigger than a football field, some are the size of a loaf of some are the size of a loaf of bread.bread.

• Radio waves can move through Radio waves can move through your body.your body.

MicrowaveMicrowave• Microwaves are about the size of a bee.Microwaves are about the size of a bee.

• Used to cook foods, track weather, radarUsed to cook foods, track weather, radar

InfraredInfrared

• Infrared light waves are Infrared light waves are about the size of the head of about the size of the head of a pin.a pin.

• Every object gives off Every object gives off infrared light.infrared light.

Visible LightVisible Light

• The light we see is called The light we see is called visible light.visible light.

• ROYGBIV ROYGBIV • Red, longest wavelength, Red, longest wavelength, least energyleast energy

• Violet, short wavelength, Violet, short wavelength, tons of energytons of energy

• Claude Monet painted the picture. He is known as the father of impressionistic art. Impressionist art is based on the use of color, which has to "draw" the motive without resorting to line.

UltravioletUltraviolet

• Ultraviolet (UV) light waves are Ultraviolet (UV) light waves are about the size of a molecule.about the size of a molecule.

• Causes sunburns, cancer, Causes sunburns, cancer, wrinkleswrinkles

• Gives our body Vitamin DGives our body Vitamin D

X rayX ray

• X-rays have very small X-rays have very small wavelengthswavelengths

• Used to see bones, teethUsed to see bones, teeth

One of the first ever x-raysOne of the first ever x-rays

Gamma RaysGamma Rays

• Gamma rays are the highest Gamma rays are the highest energy light waves.energy light waves.

• Super tiny wavelengthSuper tiny wavelength