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Physics 4
Crossword
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
Check
Across: 1. the angle of incidence is equal to the angle of ___ 3. sound cant travel through this 7. you hear thunder before you see lightning true or false 8. this instrument uses lenses to see things that are very far away 10. this metal is magnetic 11. this particle has a negative charge 15. use this to see over obstacles 16. the Earth has a magnetic ______ 17. this is used to disperse white light 18. these particles are positively charged 19. this instrument uses lenses to see very small things 20. unlike poles _____
Down: 1. this colour is refracted the least 2. this type of lens converges light 4. speed of sound in air in m/s 5. loudness of sound is measured in ____ 6. this is caused by vibrations 9. this is reflected sound 12. sound needs this to travel 13. this colour is refracted the most 14. light moving from air into glass is refracted _____ the normal
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