Comprehension and additional task exercises pages 172 and 173 from Next Page Science KS3 Complete. Accompanying PowerPoint and word searches available for free from the website.
This exercise covers:
• Refraction as the change in direction caused when light slows or speeds up on moving between mediums
• The ray diagram for a glass block with a full explanation
• How the lens in the eye works to produce an image
• The cause of short sightedness (myopia) and its correction with a concave lens
• Virtual images produced by refraction
• An exercise completing ray diagrams for different lens thicknesses
• An exercise on completing the path of a rays of light passing through a glass block
• Amazing WHAT? facts
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