Properties of Electromagnetic Waves

Which of the following are true of electromagnetic waves?

• They all travel at the same speed

• They need a medium to travel

• Only a small portion of them are visible to humans

• They all carry the same amount of energy

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Gamma rays are the highest frequency electromagnetic waves. Which are true about Gamma rays.

• They are used in 5G cellphone communication

• They are more dangerous to humans than UV rays

• They have a smaller wavelength than visible light

• Gamma rays carry less energy than radio waves

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Electromagnetic waves are produced when a charged particle accelerates. This creates a "ripple" or wave in the _________ ________.

• gravitational field

• quantum realm

• space-time continuum

• electric field

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Which range of electromagnetic waves have the longest wavelength?

• Gamma Ray

• Visible

• Microwave

• Radio

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The image shows the tendency of a wave to spread out when passing through a narrow gap. This effect is called...

• diffraction

• polarization

• transmission

• absorption

When white light is diffracted we see a rainbow. Why is this?

• The wavelengths become shorter as they get diffracted

• Different wavelengths are diffracted at different angles

• The white light is absorbed and the different colors are emitted

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What happens after an electron has been excited into a high energy orbital?

• It falls back into a low energy orbital and releases a photon

• It stays there until it is hit by another photon

• It slowly falls back into a low energy orbital

• It launches out of the atom

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Different materials reflect, absorb, and transmit light waves in different ways. Which of these behaviors causes a material to get hotter in the sun?

• Reflect

• Absorb

• Transmit

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Light refraction causes the straw to appear in a different position inside this cup of water. Which of the following are also examples of refraction?

• Camera lenses

• Rainbows after rain

• Neon Lights

• Eye glasses

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When a light wave hits these glasses, what may happen to it?

• It is reflected

• It is absorbed

• It is transmitted

• All of the above

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