Light - Refraction Explained - Distance Learning and Homeschool for KS3

This is an action-packed distance learning or home school introduction to refraction.

This resource has been designed so that the animated PowerPoint replaces the teacher by providing structure, sequence, knowledge and answers. The worksheets, cut-outs, foldable and progress check provide a familiar medium for students to develop and test their knowledge, continue to develop their literacy skills and use their creativity to organise their learning and assess their progress.

The simulated practical shows how measurements for the angles of incidence and reflection when light is refracted through a glass block are obtained and provides a set of results for the students to draw a conclusion.

What’s Covered

• The more dense the medium the slower the speed of light.
• When light travels from a less dense medium to a more dense medium it is bent towards the normal.
• When light travels from a more dense medium to a less dense medium it is bent away from the normal.
• Light hitting a boundary at 900 is not refracted.
• Light is not refracted at a curved boundary.
• Complete ray diagrams showing refraction.
• Design an experiment and results table to investigate refraction through a semi - circular glass block
• Why lightning is seen before thunder is heard when a cloud discharges.
• Real and apparent depth.

Resources

1. An animated PowerPoint which guides the student through the lesson by:

• explaining how to use distance learning effectively;
• explaining how to use this resource;
• explaining current, voltage and resistance and the relationship between them;
• providing the answers to all the worksheets so that the students can mark and correct their work.

1. Four worksheets, and two cut-out activities, the answers to which are in the PowerPoint.

2. A foldable and cut-out activity so that students can record and organise their learning.

3. A checklist for students to use to assess their progress.

4. Digital quick test

5. For those students without internet or a computer or a computer at home a condensed printable copy of the PowerPoint is provided for distribution by school.

Ways to Use this Resource

• Upload PowerPoint and worksheets to school intranet. Students print their own worksheets.
• Upload PowerPoint and worksheets to school intranet and provide a hardcopy of worksheets for students. Those families who do not wish to collect worksheets or who are in isolation can print the worksheets at home.
• Students without photocopying facilities are instructed to write their answers in full sentences

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