Revision( unit 4)

The following diagram shows the ray diagram when a torchlight is torched towards a mirror. Which of the following is the correct reflected ray?

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Ariff is watching a cat on a wall using a periscope. Which of the following is the correct reflected ray diagram in the periscope? Tick the correct answer.

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All of the following are sources of light except...

• the sun

• a light bulb

• fire

• the moon

Light is a form of energy.

• True

• False

Choose the image of a periscope:

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A periscope allows you to see:

• Objects over the top of something.

• Very small objects.

A mirror has a _________________________.

• smooth, shiny surface that reflects light.

• smooth, shiny surface that absorbs light.

• bumpy, rough surface that reflects light.

How does light travel

• It curves around corners

• Really slow

• In a straight line

• In circles

The diagram shows a light ray striking an object.

In the diagram, the light ray striking the object is-

• absorbed

• stopped

• reflected

You are enabled to see objects because...

• light travels out of your eyes and onto an object.

• light travels out of an object.

• light reflects off of an object and into your eyes

• light brightens up objects.