Unit 4F: Simple circuits: L.O. 1, 2: N.C. 4.1a

Unit 6F: How we see things

Unit 6F: How we see things

Unit 6F: How we see things

How we see things

Unit 6F: How we see things

Unit 6F: Vocabulary

Some useful words

Opaque

Reflect

Reflection

Light beam

Mirror

Light travelling

A material that light cannot pass through

When light ‘bounces’ off a surface in particular shiny surfaces such as mirrors

An image viewed in a mirror, for example

A thin column of light such as projected by a torch

A shiny surface that reflects light

Light is always moving

Unit 6F: How does light travel?: L.O. 1, 2: N.C. 4.3a

Unit 6F: How does light travel?

How does light travel?

Unit 6F: How does light travel?: L.O. 1, 2: N.C. 4.3a

Unit 6F: How does light travel?

Unit 6F: How do we see things?: L.O. 3: N.C. 4.3d

Unit 6F: How do we see things?

How do we see things?

Unit 6F: Reflection: L.O. 4, 5: N.C. 4.3c

Unit 6F: Reflection

Reflection

Unit 6F: Reflection: L.O. 4, 5: N.C. 4.3c

Unit 6F: Reflection

Unit 6F: More reflections: L.O. 6, 7: N.C. 4.3c

Unit 6F: More reflections

More reflections

When light is reflected it’s direction of travel changes

angle i = angle r

Unit 6F: Shiny and dull surfaces: L.O. 8, 9: N.C. 4.3c

Unit 6F: Shiny and dull surfaces

Shiny and dull surfaces

You are going to investigate what types of surfaces reflect light the best, shiny or dull.

Test each of the surfaces to record whether it reflects a light beam from a torch and whether you can see yourself in the surface or not.

Can you draw any conclusions from your results?

Surface Dull or shinyLight reflected from

torch I can see my face

reflected

Mirror

Polished metal sheet

Sheet of perspex

Sheet of paper

Piece of polished wood

Shiny painted surface

Dull painted surface

Unit 6F: Shadow investigation: L.O. 10, 11, 12, 13: N.C. 4.3b

Unit 6F: Shadow Investigation

Shadow Investigation

How can we change the size and position of the shadow?

Plan how you are going to investigate this?

What will you change

Unit 6F: Shadow investigation: L.O. 10, 11, 12, 13: N.C. 4.3b

Unit 6F: Shadow Investigation

Shadow Investigation – support slide

How can we change the size and position of the shadow?What happens to the size of the shadow when you move the figure nearer to the light?What happens to the shadow when you move the figure further from the light?Does moving the screen have the same effect?Does moving the light make a difference?

Unit 6F: Shadow investigation: L.O. 10, 11, 12, 13: N.C. 4.3b

Unit 6F: Shadow Investigation

Shadow Investigation – extension slide

Measure the distance between the figure and the screen and the height to the shadow.Record the results in a table

Plot your results on a line graph of Distance between figure and screen vs. height of shadow.

Are there any patterns in the results you have?

Distance between figure and screen

Height of shadow

Unit 6F: Summary: L.O. 14: N.C.

Unit 6F: Summary

Concept Map

How we see things

Ligh

t

Travels from a

sourceIn a straight line

Light enters our eyes

Direction of a ray can be indicated by an arrow

Reflections

By mirrors

Object is seen

Direction of beam is changed

Shiny surfaces better than dull

Shad

ows

Formed by opaque objects

Size can be changed

Object nearer light

Object nearer surface