Light and Optic

Multiple Choice

Light is a type of electromagnetic radiation that is visible to the eye.

• True

• False

Properties of Light

1. Light travels in a straight line

Properties of Light

2. Light travel very fast--around 300,000 kilometers per second. At this speed, it can go around the Earth 8 times in one second!

Light travels much faster than sound. For example:

• Thunder and lightning start at the same time, but we will see the lightning first.

• Fireworks show how light travels faster than sound. We see the light almost instantly, but the sound arrives later. 

  
  

Multiple Select

Which of the following is an example of light traveling faster than sound?

• Lightning

• Fireworks

• Thunder

• None of the above

Open Ended

Why are we able to see things?

Multiple Choice

A ______ object is one that produces light.

• luminous

• non-luminous

• transparent

Multiple Choice

A non-luminous object is one that ______ light.

• produces

• destroys

• reflects

Multiple Choice

Which of the following is NOT a luminous object?

• stars

• flashlight

• candle

• moon

Multiple Choice

Which of the following options is a non-luminous object?

• a flashlight

• a planet

• an electric bulb

• the sun

Multiple Choice

A shadow is a _____ area on a bright surface.

• light

• dim

• dark

Multiple Choice

A shadow is caused by something blocking the source of a light.

• True

• False

Optics and Light Energy

Essential Question:

How does light energy react with various materials (such as liquids, solids, gases)?

Multiple Select

What are examples of light energy?

• sun

• stars

• glass

• fire

Multiple Choice

Reflection is?

• bouncing of light

• bending of light

• absorption of light

Multiple Choice

When does Light stop traveling in a straight line?

• when it strikes an object.

• when it gets tired.

Multiple Choice

Jaden put a straw in a glass of water. The straw looked like it was broken. Why?

• light was reflected.

• light was refracted.