Refraction of Light OALH

Do Now

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1. Write down the order of the electromagnetic waves in order from longest wavelength to shortest wavelength.

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2. Give one danger of gamma rays.

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3. Give the equation for calculating wave speed.

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4. Name the piece of equipment used to investigate the wavelength of a water wave.

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5. Write the equation for gravitational potential energy.

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6. Explain why x-rays can be used in medical imaging.

Key Knowledge

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When a wave changes direction because it travels at different speeds along the wave front when entering a medium that is more or less dense it is called …

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What happens to the wave when light moves from a less dense to a more dense medium?

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What happens to the wave when light moves from a more dense to a less dense medium?

1

Waves do not change direction when…

1

When a wave changes direction because it travels at different speeds along the wave front when entering a medium that is more or less dense it is called …

1

What happens to the wave when light moves from a less dense to a more dense medium?

1

What happens to the wave when light moves from a more dense to a less dense medium?

1

Waves do not change direction when…

Recall Quiz

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1. What is the correct picture to show how the direction of a wave will change when it moves from glass to air?

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2. What is the correct definition of refraction?

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3. When a wave moves from water to glass at an angle what will happen?

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4. When a wave moves from plastic to air at an angle what will happen?

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5. In which example will refraction not happen?

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6. Which diagram correctly shows what will happen when a ray of light moves from glass to air?

Application Task

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We do: Copy and complete the diagram. Explain why the wave is refracted.

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You do: Copy and complete the diagram. Explain why the wave is refracted.

Copy and complete the diagrams

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a.

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b.

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c.

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d.

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e.

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f.

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g.

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h.

Plenary

1

1. Write down the order of the electromagnetic waves in order from longest wavelength to shortest wavelength.

2. Give one danger of gamma rays.

3. Give the equation for calculating wave speed.

4. Name the piece of equipment used to investigate the wavelength of a water wave.

5. Write the equation for gravitational potential energy.

6. Explain why x-rays can be used in medical imaging.

When a wave changes direction because it travels at different speeds along the wave front when entering a medium that is more or less dense it is called …

What happens to the wave when light moves from a less dense to a more dense medium?

What happens to the wave when light moves from a more dense to a less dense medium?

Waves do not change direction when…

When a wave changes direction because it travels at different speeds along the wave front when entering a medium that is more or less dense it is called …

What happens to the wave when light moves from a less dense to a more dense medium?

What happens to the wave when light moves from a more dense to a less dense medium?

Waves do not change direction when…

1. What is the correct picture to show how the direction of a wave will change when it moves from glass to air?

2. What is the correct definition of refraction?

3. When a wave moves from water to glass at an angle what will happen?

4. When a wave moves from plastic to air at an angle what will happen?

5. In which example will refraction not happen?

6. Which diagram correctly shows what will happen when a ray of light moves from glass to air?

We do: Copy and complete the diagram. Explain why the wave is refracted.

You do: Copy and complete the diagram. Explain why the wave is refracted.

a.

b.

c.

d.

e.

f.

g.

h.

Label the diagram.