Waves and temperature

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Across
  1. 2. a measure of how hot or how cold something is
  2. 5. a measure of how many times per second an event happens, such as the number of times a wave repeats itself every second
  3. 7. the temperature of an object taken in the scale using absolute zero
  4. 9. the amount of radiated electromagnetic energy emitted by a light-emitting or luminous object
  5. 11. a periodic disturbance that is the maximum variation from zero
  6. 14. of a periodic wave the product of the wavelength of the wave multiplied by its frequency
  7. 17. refers to luminous objects that produce light because they are hot; the higher the temperature, the brighter the light, and the colour also changes
  8. 18. the characteristic radiation emitted by a blackbody when heated
  9. 20. the distance between successive corresponding parts of a periodic wave
Down
  1. 1. a region of increased pressure in a medium during the transmission of a wave
  2. 3. a region of reduced pressure in a medium during the transmission of a sound wave
  3. 4. a wave of short duration
  4. 6. the movement of particles due to an energy wave passing through them
  5. 8. an electromagnetic wave or radiation that includes visible light, radio waves, gamma rays and x-rays
  6. 9. a wave for which the disturbance is parallel to the direction of propagation
  7. 10. the transfer of energy through a medium without any net movement of matter
  8. 12. an object that absorbs all radiation that falls on it
  9. 13. a wave for which the disturbance is at right angles to the direction of propagation
  10. 15. radiated by a blackbody the total energy radiated by a blackbody every second
  11. 16. a disturbance that repeats itself at regular intervals
  12. 19. the amount of time, measured in seconds, that one cycle or event takes, such as the time taken for an object moving in a circular path and at a constant speed to complete one revolution