# Refraction

In this lesson we will be looking at what may happen when a wave moves from one medium to another. We will look at how we can measure the effect of refraction and also how to explain it.

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, letâ€™s see what you can remember from this topic. Hereâ€™s a quick quiz!

Q1.What piece of apparatus is used to create water waves?

1/5

Q2.A wave has a wavelength of 3 cm, and a frequency of 3 Hz. What is the wave speed of the wave?

2/5

Q3.Which of these steps to measure the speed of waves on a string will increase the reliability?

3/5

Q4.Which of these steps to measure the speed of waves on a string will increase the accuracy?

4/5

Q5.A photograph of a length of string shows 4 waves. If the string has a length of 42 cm and the vibration generator is set to 3 Hz. What is the wave speed of the waves on the string?

5/5

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, letâ€™s see what you can remember from this topic. Hereâ€™s a quick quiz!

Q1.What piece of apparatus is used to create water waves?

1/5

Q2.A wave has a wavelength of 3 cm, and a frequency of 3 Hz. What is the wave speed of the wave?

2/5

Q3.Which of these steps to measure the speed of waves on a string will increase the reliability?

3/5

Q4.Which of these steps to measure the speed of waves on a string will increase the accuracy?

4/5

Q5.A photograph of a length of string shows 4 waves. If the string has a length of 42 cm and the vibration generator is set to 3 Hz. What is the wave speed of the waves on the string?

5/5

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the â€˜Resume Videoâ€™ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click â€˜Nextâ€™ below.

Quiz:

# Refraction

This quiz will test your understanding of the topic in the lesson, and prior knowledge from earlier in this topic.

Q1.What are the two requirements for refraction?

Select two (2) boxes

1/5

Q2.What is the law of reflection?

2/5

Q3.Use the diagram to determine which of the following sentences is false

3/5

Q4.When a wave slows down as it crosses a material interface, which of the following is true? (Tick 2 boxes)

Select two (2) boxes

4/5

Q5.What is the wavelength of the wave?

5/5

Quiz:

# Refraction

This quiz will test your understanding of the topic in the lesson, and prior knowledge from earlier in this topic.

Q1.What are the two requirements for refraction?

Select two (2) boxes

1/5

Q2.What is the law of reflection?

2/5

Q3.Use the diagram to determine which of the following sentences is false

3/5

Q4.When a wave slows down as it crosses a material interface, which of the following is true? (Tick 2 boxes)

Select two (2) boxes

4/5

Q5.What is the wavelength of the wave?

5/5

# Lesson summary: Refraction

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Climb stairs

On the spot:
Chair yoga