Law of Reflection and Refraction of Light

Diagram shows a phenomenon occurs when the spotlight is directed onto a mirror surface. What is the principle of light shown in the situation?

• Light travels in a straight line

• Refraction of light

• Reflection of light

• Light travels in parallel

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NGSS.MS-PS4-2

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

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NGSS.MS-PS4-2

Tick the correct of TWO devices which use the principle of light reflection in our daily lives.

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NGSS.MS-PS4-2

When does the light is refracted?

• When light travels in a straight line

• When light is bounced

• When light travels in two different mediums

• When light cannot pass through an opaque object

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NGSS.MS-PS4-2

Diagram shows the condition of a spoon in a glass of water.

What can be observed about the spoon?

• The spoon looks bent.

• The water is clearer.

• The water level rises.

• Light is refracted.

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NGSS.MS-PS4-2

What is the conclusion from your observation in this picture?

• Light travels in a straight line

• Light can be refracted

• Light can be reflected

• Light can pass through a transparent material

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NGSS.MS-PS4-2

What is the angle of reflection equal to?

• The angle of refraction

• The angle of incidence

• The angle of absorption

• The angle of light

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NGSS.MS-PS4-2

What might explain why light travels in a straight line?

• If there is nothing to interfere with light waves, they should travel in a straight line.

• Light waves will always travel in a straight line, even if they come into contact with another object.

• Light waves don't travel in a straight line.

• Light waves travel in a straight line because sound waves travel in a straight line.

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

Light bending as it passes from one medium (object) to another is...

• Refraction
• Reflection

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NGSS.MS-PS4-2

Glass has a _____________ index of refraction than air.

• Equal
• Greater
• Less
• Impossible to say