Electromagnetic Review

What happens to an electromagnetic wave as it passes from space to matter?

• It changes frequency

• It changes wavelength

• It slows down

• It speeds up

Which property of the carrier wave shown above has been modulated

• amplitude

• energy

• frequency

• speed

Which type of electromagnetic wave has the longest wavelengths?

• infrared waves

• microwaves

• radio waves

• ultraviolet waves

Carla is learning about types of electromagnetic waves. What is the difference

between a microwave and a gamma wave?

• A - Microwaves are common and gamma waves are rare.

• B - Microwaves are silent and gamma rays are audible.

• C - Microwaves were invented by humans and gamma waves were not.

• D - Microwaves and gamma waves have different wavelengths.

Wavelength and frequency are related. Gamma rays, microwaves, visible light, and infrared rays all have different frequencies. Which of the following lists them in the correct order from longest wavelength to shortest wavelength?

• A - visible light, microwaves, infrared rays, gamma rays

• B - infrared rays, microwaves, visible light, gamma rays

• C - gamma rays, infrared rays, microwaves, visible light

• D - microwaves, infrared, visible light, gamma rays

When NASA scientists communicate with the mars rover, they use electromagnetic radiation with a long wavelength and low energy.

Which type of radiation do they most likely use?

• A - X-rays

• B - visible light

• C - radio waves

• D - infrared waves

As light passes through the air, some of the light energy is transferred to the

particles in the air. What process is occurring with this transfer of energy?

• A - absorption

• B - reflection

• C - refraction

• D - transmission

Light can sometimes create an optical illusion. For example, you may see something

under water and reach into the water to pick it up. However, the object is not where

you thought it would be. What property of light is responsible for this optical illusion?

• A - absorption

• B - reflection

• C - refraction

• D - transmission

What happens when a white object that cannot be seen in the dark is illuminated?

• A - Light is given off by the object.

• B - Light is absorbed by the object.

• C - Light is reflected by the object.

• D - Light is refracted by the object.

Which statement explains why light bends when it reaches the surface of the water?

• A - Light bends because water changes the amount of energy it carries.

• B - Light bends because water absorbs some of the light that reaches it.

• C - Light bends because the water reflects some of the light that reaches it.

• D - Light bends because water changes its speed when it moves from air into

  water.