• Sun’s energy = __– __

Topic: Energy from the sun

Electromagnetic Energy – •__

•__

Parts of a Wave

Frequency = __

Shorter wavelength = _____ = _____

Larger wavelength = _____= _____

All electromagnetic waves…1) Travel 300,000,000 m/sec (3x108

m/sec)2) Wavelengths have different properties

Where do you think we can find

information on the electromagnetic

spectrum?

Take out yourESRT, page 14

ESRT pg 14

1. Radio Waves

1) Radio Waves

• ___• ___

2) Microwaves

2) Microwaves

• ___• ___

3) Infrared Waves

3) Infrared

• ___• ___

Infrared image of two burritos

IR image of 2 burritos

Infrared camera finds a prone victim through

thick smoke.

4. Visible Light4. Visible Light

We use this wavelength the most!

• ___• ___

Red = longest

Violet = shortest

5. Ultraviolet

5) Ultraviolet• Used to sterilize, as bacteria can be

killed by UV.

Picture from Matsutek Enterprises Co., Ltd.

Picture from the College of Dental Science and Hospital

5) Ultraviolet• Causes skin to

tan

A sunburn, photographed 2 days after a 5-hour sun exposure. Some parts of the skin are unburned because they were covered by a bathing suit during the exposure.

Skin Cancer

6. X-Rays6. X-Rays

6) X-Rays• Short

wavelength __

• ___

• ___

7) Gamma Rays

7. Gamma Rays7. Gamma Rays

7) Gamma Waves7) Gamma Waves• ___• ___

Gamma Ray burst

How different wavelengths are used in How different wavelengths are used in astronomy?astronomy?

Radio/Microwaves Infrared

Visible light

X -RaysUltraviolet

Final Question

• What type of electromagnetic energy has the greatest amount of energy and how can you tell?

• http://www.polleverywhere.com/multiple_choice_polls/LTE1NDg4NTI5NTQ/web