Light Waves Ch 3 Review

What happens to energy when light changes a material?

• If light changes a material, the energy was absorbed.

• If light changes a material, the energy was transmitted.

• If light changes a material, the energy was reflected.

• Light cannot change a material.

What happens to energy when light does not change a material?

• If light does not change a material, the energy was not absorbed.

• If light does not change a material, the light does not have energy.

• If light does not change a material, the energy is removed.

• Light cannot change a material

Green Legos reflect green light. Green Legos transmit ultraviolet light. Which type of light is more likely to melt the Legos?

• Neither type of light is likely to melt the Legos because the Legos did not take in energy from green light or from ultraviolet light.

• There is no way to know because they are two different types of light, and different types of light can change a material in different ways.

• The ultraviolet light is more likely to melt the Legos because the ultraviolet light can pull energy out when it passes through.

• The green light is more likely to melt the Legos because the green light can pull energy out when it bounces off.

What is happening to the green light and its energy in this picture?

• The green light is being reflected and the energy is not absorbed.

• The green light is being reflected and the energy is absorbed.

• The green light is being transmitted and the energy is not absorbed.

• The green light and the energy are both being absorbed.

What is happening to the red light and the energy in this picture?

• The red light and the energy are both absorbed.

• The red light is absorbed, but the energy is not absorbed.

• The red light is transmitted, and the energy is absorbed.

• The red light is reflected, and the energy is absorbed.

What is happening to the microwave light and the energy in this picture?

• The microwave light is transmitted and the energy is not absorbed.

• The microwave light is transmitted and the energy is absorbed.

• The microwave light is reflected and the energy is not absorbed.

• The microwave light and the energy are absorbed.

The same type of light can be brighter if it has a different _____________.

• wavelength

• frequency

• amplitude

If the ________________ is different, it is a different type of light.

• amplitude

• wavelength

• wave height

Solar panels reflect microwave light, transmit radio light, and absorb visible light. Which type of light is more likely to increase electrical energy?

• The visible light can cause the solar panel to increase electrical energy.

• The microwave light can cause the solar panel to increase electrical energy.

• The radio light can cause the solar panel to increase electrical energy.

• Any of these types of light can cause an increase in electrical energy because all light carries energy that can cause materials to change.

How does this model help explain why Australia has such high rates of skin cancer?

• More UV light is reflected by sulfuric acid so less UV light hits Australia.

• Less UV light is absorbed by ozone so more UV light hits Australia.

• Less UV light is absorbed by ozone so more UV light hits Brazil.

• The information on this model is not related to Australia's skin cancer rate.