Optics 3: Refraction

• Physics
• Secondary Education
• Age 13

Forces and Motion

Lesson 11. 

Refraction of Light

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Highlights of the Day

•  describe refraction of light at the boundary between air and glass or air and water in terms of change in speed

• Values :  Responsibility and Determination

Let's do this!

Challenge Task

• In one minute, list as many transparent materials as you can. Try to include solids, liquids, and gases.
• Why do you think you cannot see clearly when looking through a glass of water? 

The background, through the glass of water, appears distorted which means changed to be _______

1. clearer
2. less clear
3. transparent

The background through the glass of water appears distorted because of ____________.

1. reflection
2. refraction

The material that light passes through is called a __________.

1. medium
2. opaque
3. ray

Which is NOT an example of a medium?

1. air
2. glass
3. water
4. wood

You will remember that light travels 'very fast'. The speed of light in air is __________ kilometres per second.

1. 30
2. 30 000
3. 300 000
4. 300 000 000

When light passes from air into water or glass, the light travels ________.

1. slower
2. faster
3. at the same speed
4. at 0 m/s

Change in speed

The change of speed can cause the light to change ___________.

1. its speed
2. its direction
3. distance

____________ of light is defined as the change in direction of light on passing from one medium to another because of change in speed.

1. Reflection
2. Diffraction
3. Refraction

Simulation

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