GCSE Physics – Refraction

Last updated: 27/05/2020

Learning Objectives

-I can describe what happens to the path of a wave when is refracted
-I can explain why refraction happens

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  1. Current
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  1. What is refraction?

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  2. When does refraction occur?

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  3. What materials does refraction occur between?

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  4. When a wave enters another material, why does direction change?

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  5. Why does direction change during refraction?

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  6. What does changing speed of a ray cause, if the ray is travelling at an angle to the normal?

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  7. Which part of a wave stays the same when it enters a new material?

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  8. What speed do light waves travel at in different materials?

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  9. How can you analyse refraction using a glass block?

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  10. What do different materials always have?

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  11. Which substance is more optically dense?

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  12. Which substance is less optically dense?

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  13. If a light ray moves from air to glass, what happens to it?

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  14. If a light ray moves from glass to air, what happens to it?

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  15. What happens when a light ray moves to a new substance?

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  16. If a light ray enters a denser substance, what happens to speed?

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  17. If a light ray enters a denser substance, what happens to direction?

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  18. If a light ray enters a less dense substance, what happens to speed?

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  19. If a light ray enters a less dense substance, what happens to direction?

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  20. What is the relative speed of a light wave in a dense material?

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  21. What is the relative speed of a light wave in a low density material?

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  22. What is the formula for wave speed?

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  23. If a wave slows down, what happens to its wavelength?

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  24. If a wave speeds up, what happens to its wavelength?

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