Quiz about Electromagnetic Radiation

Question 1

If we shine light on the surface of a metal, we can knock electrons out of the metal. This is called the photoelectric effect.

What does the photoelectric effect tell us about the nature of light?

Accepted Answer

Light is made of particles.

Answer

Light travels at high speeds.

Answer

Light acts like a wave.

Answer

Light is made of electrons.

Question 2

Joan performed a shadow puppet play for her younger brother by shining a flashlight on paper cutouts behind a curtain. What happens to the light from the flashlight?

Accepted Answer

The light is transmitted through the curtain.

Answer

The light is absorbed by the curtain.

Answer

The light is transpired through the curtain.

Answer

The light is diffused by the curtain.

Question 3

If a straight stick is partially submerged at an angle in water in a clear glass, how will the stick look from the side of the glass?

Accepted Answer

The stick will look bent.

Answer

The stick will look straight.

Answer

The stick will disappear.

Answer

Nothing will change about the look of the stick.

Question 4

Study the image.

The image shows a light ray coming from the air and hitting a water medium.

What will happen to the light ray?

Accepted Answer

It will bend closer to the normal line.

Answer

It will continue without changing direction.

Answer

It will be absorbed by the new medium.

Answer

It will bend away from the normal line.

Question 5

Study the image.

The image shows a ray of light entering medium 2 from medium 1.

Which statement is true based on this image?

Accepted Answer

Light travels faster in medium 2.

Answer

Light may travel at different speeds in the mediums or at the same speed. We need more information.

Answer

Light travels faster in medium 1.

Answer

Light travels at the same speed in both mediums.

Question 6

Study the image.

The image shows a ray of light entering medium 2 from medium 1.

Which statement is true based on this image?

Accepted Answer

Both mediums have the same density.

Answer

Medium 1 and medium 2 may have different densities or the same density. We need more information.

Answer

Medium 1 is denser than medium 2.

Answer

Medium 2 is denser than medium 1.

Question 7

Complete the sentence.

A light ray entering a new medium from air may bend. A __________ medium will bend the light more.

Accepted Answer

denser

Answer

less dense

Answer

more transparent

Answer

less transparent

Question 8

Tanya is looking at two gas burners. The first burner has an orange-red flame. The second burner has a blue flame.

What can we say about these flames?

Accepted Answer

The blue flame is hotter.

Answer

The orange-red flame is hotter.

Answer

The flames have the same temperature because both burners burn gas.

Answer

The flames may have different temperatures or the same temperature. We need more information.

Question 9

Which is NOT a type of electromagnetic wave?

Accepted Answer

Sound wave.

Answer

X-ray.

Answer

Radio wave.

Answer

Microwave.

Question 10

Electromagnetic waves are sometimes demonstrated by rippling waves in water. However, electromagnetic waves are different from water waves. Which is a characteristic that makes electromagnetic waves and water waves different?

Accepted Answer

All electromagnetic waves can travel in a vacuum.

Answer

All water waves have higher frequencies.

Answer

All electromagnetic waves are transverse waves.

Answer

All water waves have longer wavelengths.

Question 11

A clock is in a transparent jar. All the air is pumped out from inside the jar. The alarm of the clock goes off.

What will be true about this situation?

Accepted Answer

The clock cannot be heard, but it can be seen.

Answer

The clock cannot be seen but can be heard.

Answer

The clock cannot be seen or heard.

Answer

The clock can both be seen and heard.

Electromagnetic Radiation

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