Shadows
I can describe what happens when light travels and how shadows can form.
Shadows
I can describe what happens when light travels and how shadows can form.
Lesson details
Key learning points
- Transparent objects transmit light (let light travel through them). Opaque objects do not transmit light through them.
- Light travels in straight lines at an extremely high speed, spreading out as it travels.
- Light rays are straight arrows added to diagrams to show the direction that some light is travelling.
- A shadow is an unlit area in the shape of an object that is blocking light.
Common misconception
Pupils sometimes think light is made up from light rays (small thing 'pieces' of light). Pupils may also think shadows are objects, reflections or that shadows are always black.
Light rays are just arrows showing the direction some light travels, like arrows on a map showing a route. Leave what light is (oscillating electric & magnetic fields) to KS4. Shadows are unlit areas that look dark compared to lit surroundings.
Keywords
Transparent - describes materials that you can clearly see through because they let light pass through them
Transmit - if light passes through a material, we say that material transmits light
Opaque - describes materials you can’t see through at all, as these materials do not let any light pass through them
Light ray - an arrow added to a diagram to show the direction that some light is travelling
Shadow - an unlit area in the shape of an object that is blocking light
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Starter quiz
6 Questions
Exit quiz
6 Questions
describes materials you cannot see through at all
letting light pass through
material that lets light pass but you can’t see through it clearly
material you can see through clearly