Light

What property do all types of waves share?

• They have the same frequency.

• They travel through all forms of matter.

• They transmit energy.

• They can travel through a vacuum of empty space.

A person with a sunburn will tell you that the sun gives off more energy with its electromagnetic rays. What does sunscreen lotion do to interfere with the transfer of energy from the sun to a person's skin?

• Causes skin exposed to the sun to tan instead of burn.

• Absorbs the radiation coming from the sun.

• Reflects most of the ultraviolet radiation from the sun.

• Causes skin cancer from the radiation emitted from the sun.

If the energy in the a transverse wave is moving from left to right, the individual particles in the medium are moving.....

• Up and down

• Right to left

• Left to right

• None of the above.

Airport security uses electromagnetic waves to see items inside of luggage without having to open the bags. Which type of electromagnetic waves would be best for airport security to use?

• X rays would be best because they are low energy waves that can penetrate gases.

• Radar waves would be best because they are low energy waves that can penetrate gases.

• Radar waves would be best because they are high energy waves that can penetrate solids.

• X rays would be best because they are high energy waves that can penetrate solids.

Electromagnetic waves travel the fastest in a

• Gas

• Vacuum

• Liquid

• Solid

A student is designing a device that can be used for communication. Which TWO waves on the electromagnetic spectrum can the student use?

• Radio waves

• X rays

• Gamma rays

• Ultra violet rays

• Microwaves

Why does the leaf of a plant look green?

• Because it absorbs green light.

• Because it absorbs only yellow and blue light.

• Because it reflects a mixture of yellow and blue light.

• Because it reflects green light.

Astronomers study radio waves to learn about the universe. Why might radio waves be used to study objects in space?

• They are sound waves that cause vibrations in stars and planets.

• They are mechanical waves that pass through interstellar particles.

• They are longitudinal waves, which create compressions in the fabric of space.

• They are electromagnetic waves, so they don't require a medium.

Renee looks out a window. The window is clear, or transparent. This means most of the light that hits the window is:

• Absorbed

• Transmitted

• Reflected

• Scattered

What is true about visible light?

• visible light waves are the only electromagnetic waves humans can see.

• Visible light has a longer wavelength than infrared radiation.

• Visible light is incapable of creating chemical changes in materials.

• Visible light is created only when an object becomes hot.