Physics Crossword Week 2

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Across
  1. 2. interaction that produces kaons (6)
  2. 7. spectra with a black background and coloured lines (8)
  3. 9. mg (6)
  4. 11. one use of optical fibres (13)
  5. 12. the moment of force (6)
  6. 14. SI base unit (7)
  7. 17. k is the ____ constant (9)
  8. 19. the C in NTC Thermistor (11)
  9. 21. the m in emf (6)
  10. 22. symbol for the electromotive force (7)
  11. 23. heaviest quark (3)
  12. 25. the ability to emit visible light after absorbing non-visible light (12)
  13. 26. a way to measure where a point on a wave is positioned during the wave cycle (5)
  14. 27. has a lower refractive index than the core (8)
Down
  1. 1. extension per unit length (6)
  2. 2. force per unit cross sectional area (6)
  3. 3. areas of compression and ____ (11)
  4. 4. a factor that increases the resistance of a wire (6)
  5. 5. quantity with units Ns (8)
  6. 6. a way to de-excite (7)
  7. 8. dsinθ ÷ n = ___ (6)
  8. 10. reduced when waves pass through a polarising filter (9)
  9. 13. circuit component (13)
  10. 15. caused by unbalanced forces (12)
  11. 16. -272 °C + 273 (6)
  12. 18. principle describing the effect of two waves passing the same point at the same time (13)
  13. 20. English physicist from the Isle of Wight (5)
  14. 24. massless particle with no charge (6)