Light Waves

A light wave ...

• Can be reflected

• Can be absorbed

• Can be transmitted

• carries energy

Tags

NGSS.MS-PS4-2

Which statement best describes this image?

• Different types of waves have different wavelengths.

• Different types of waves have different amplitude.

• All waves have the same amplitude and wavelength.

Tags

NGSS.MS-PS4-1

Light waves carry [ ] from one place to another.

Answer explanation

Light waves carry energy from place to place. If a material absorbs the light, the material also absorbs the energy.

Tags

NGSS.MS-PS4-1

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 becomes warm.

• If light changes a material, the energy is removed.

• Light cannot change a material.

Tags

NGSS.MS-PS4-2

Can light cause a solar panel to get warm?

• Yes. The solar panel can take in energy from the light.

• Yes. The light pulled out energy from the solar panel

• No. Light can only damage materials.

• No. Light is not a physical thing so it cannot change physical things.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

NGSS.MS-PS4-2

Why does UV light change the solar beads when light from our class does not?

• Because the solar beads can take in energy from the sun, but not the class lights.

• Because sunlight pulls energy out from the solar beads and the class lights does not.

• Because the sun gives off a type of light that carries energy, and light from the class does not.

• Because light from the sun carries color molecules, and light for the class does not.

Tags

NGSS.MS-PS4-2

Glue reflects ultraviolet. Glue transmits X-ray light. Which type of light is more likely to harden the glue?

• Neither type of light is likely to harden the glue because the glue does not take in energy from UV or X-ray 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 X-ray light is more likely to harden the glue because the X-ray light can pull energy out when it passes through.

• The ultraviolet is more likely to harden the glue because the UV light can pull energy out when it bounces off.

Tags

NGSS.MS-PS4-2

When a material absorbs light, energy is ​ (a)   .

When a material transmits light, energy is ​ ​ (b)   .

When a material reflects light, energy is ​ (c)   .

• absorbed

• transmitted

• reflected

• heated

Tags

NGSS.MS-PS4-2

The same type of light can be brighter if it has a different ​ (a)   . If the ​ (b)   is different, it is a different type of light.

• amplitude

• wavelength

Tags

NGSS.MS-PS4-1

Draw what happens to energy when light is reflected. Use yellow arrows to represent energy.

Answer explanation

Energy is only absorbed when light is absorbed.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2