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Unit Overview: Light

National Curriculum

  • Recognise that they need light in order to see things and that dark is the absence of light
  • Notice that light is reflected from surfaces
  • Recognise that light from the sun can be dangerous and that there are ways to protect their eyes
  • Recognise that shadows are formed when the light from a light source is blocked by an opaque object
  • Find patterns in the way that the size of shadows change.
  • Recognise that light appears to travel in straight lines
  • Use the idea that light travels in straight lines to explain that objects are seen because they give out or reflect light into the eye
  • Explain that we see things because light travels from light sources to our eyes or from light sources to objects and then to our eyes
  • Use the idea that light travels in straight lines to explain why shadows have the same shape as the objects that cast them.

Lessons:

6 lessons

What is light and where does it come from?

In this lesson, we are going to be learning about light. We are going to learn about what light is, where it comes from and how shadows are formed. We are going to complete an investigation into how light behaves with transparent, translucent and opaque objects. If you would like to take part in the practical investigation you will need: a light source (e.g. lamp, torch or phone light), a piece of paper, a piece of cardboard and a piece of something transparent (e.g. clear plastic). If you do not have these items you can still complete the lesson by watching the teacher's demonstration.

  • 1 Quiz
  • 29m Video
  • Presentation(PPT)
  • Transcript

What is reflection and how can we use it?

In this lesson, we will be learning about reflection! We will learn about reflective and non-reflective materials and their uses. Then we will look at two different types of reflection: specular and diffuse reflection. Then we will learn the law of reflection. For this lesson, you will need a pencil, a piece of paper and a ruler.

  • 2 Quizzes
  • 30m Video
  • Presentation(PPT)
  • Transcript

What is refraction and how can we use it?

In this lesson, we will learn what happens when light travels through two transparent materials. We're going to learn what refraction is, how we can use it and we will carry out an investigation to show that refraction is occurring. For this lesson If you would like to take part in the demonstration you will need a piece of plain paper and a transparent glass of water. If you don't have these things then don't worry! You can still complete the lesson and watch the teacher's demonstration.

  • 2 Quizzes
  • 31m Video
  • Presentation(PPT)
  • Transcript

How do we see light?

In this lesson, we will learn the steps that take place when we see an object. We will draw diagrams to show how we see; we will learn the different parts and functions of the human eye; and we will learn why people wear glasses and sunglasses. In this lesson you will need a piece of paper, a pencil and a ruler.

  • 2 Quizzes
  • 34m Video
  • Presentation(PPT)
  • Transcript

Where do different colours come from?

In this lesson, we will be learning how we can see different colours. We will apply our learning of reflection and refraction from previous lessons to understand how rainbows are made. At the end of the lesson there will be a chance to try creating your own rainbow by refracting light! If you would like to try making your own rainbow then you will also need a transparent glass of water or an old CD. You can still take part in the lesson if you do not have these items.

  • 2 Quizzes
  • 28m Video
  • Presentation(PPT)
  • Transcript

What are some uses of light?

In this lesson, we will learn some of the different uses of light. First, we will look at what a periscope is and how it works. Then, we will learn about the different kinds of lenses that help people to see. To finish our lesson, we will learn about shadow puppet theatres and make our own!

  • 2 Quizzes
  • 31m Video
  • Presentation(PPT)
  • Transcript