P5 - Space for reflection

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Across
  1. 8. ... = speed of light in a vacuum ÷ speed of light in a medium
  2. 10. The bending of a wave when it enters a medium of a different density.
  3. 12. The force that pulls an object moving in a circle toward the center of the circle and causes the object to follow a curving path.
  4. 14. Deceasing the volume of a sealed container will make what increase?
  5. 16. ... = image size ÷ object size
  6. 17. The force between an object and air which causes the object to slow down.
  7. 18. Projectiles follow a curved path. The curved trajectory of a projectile is called a ...
  8. 19. The tendency of an object to keep moving in the same direction, influenced by the mass and velocity of the object.
  9. 20. To restrict the vibrations of a transverse wave to just one direction.
  10. 21. The distance travelled in a certain time.
Down
  1. 1. The spreading out of waves as they pass through a gap.
  2. 2. What does EM stand for when referring to EM waves?
  3. 3. The downward force that acts upon everything on the earth.
  4. 4. The speed of an object in a particular direction.
  5. 5. This theory states that gasses consist of very small particles which are constantly moving in random directions.
  6. 6. When waves meet with each other, this can cause a disturbance. This disturbance is known as ...
  7. 7. The minimum angle at which total internal reflection occurs.
  8. 9. A converging lens is also known to be what?
  9. 11. How quickly something is speeding up.
  10. 13. A quantity having direction as well as magnitude.
  11. 15. These waves are used in satellite communication.