6.2.3.1 How Light Travels

Electromagnetic radiation that you can see:

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Energy carried by an electromagnetic wave:

• thermal energy

• chemical energy

• radiant energy

• nuclear energy

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The Electromagnetic spectrum is divided into 7 regions of energy: Match the following regions with the type of waves they contain.

• Gamma

• A: this includes frequency waves and microwaves

• Radio Wave

• C: this includes UV and X-Rays

• Infrared Waves

• D: this includes rays found in space

• Ultraviolet

• B: this includes IR and Visible Light

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What is the ultimate source of electromagnetic waves?

• T.V. Antennas

• E.T. (Extra-Terrestrials)

• Vibrating Charged Particles

• Radios

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The most dangerous type of electromagnetic radiation.

• Microwaves

• Ultraviolet

• X-rays

• Gamma rays

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What unit is light wavelength measured in?

• nanometers

• kilometers

• micrograms

• milliliters

Why do we see different colors?

• Different colors are a result of magic
• reflected light has different amplitudes

• reflected light has different frequencies

• reflected light has different wavelengths

What does the energy of an electromagnetic wave depend on? (CAREFUL)

• amplitude

• frequency

• particle size

• speed

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Your perception of the intensity of light:

The amount of light energy that passes through a square meter of space in one second:

• intensity

• wavelength

• frequency

• watts

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