The light academy

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Across
  1. 3. Time for a particle to make one colplete oscillation
  2. 5. Electromagnetic radiation within a certain portion of the electromagnetic spectrum
  3. 9. Range of frequencies of electromagnetic radiations and their respective wavelenghts and photon energies
  4. 11. Lying or extending across or in a cross direction
  5. 14. The distance travelled by a wave in a specific contest
  6. 15. Line that marks the limits or edges of something and separates it from other things or places
  7. 16. Small breach on a surface
  8. 17. The change of direction of a wave after bumping into a barrier or a surface
  9. 20. A transparent optical element with flat and polished surfaces, usually used to the disperse light
  10. 21. The space devoid of matter
  11. 22. The distance between two similar points on a wave
Down
  1. 1. It refers to the maximum displacement of a particle from its rest position
  2. 2. A change in the observed frequency of a wave
  3. 4. Substance that makes possible the transfer of energy from one location to another
  4. 6. State or production of a state in which rays of light and similar radiation exhibit different properties in different directions
  5. 7. It states that every point of a wavefront is itself source of a spherical waves
  6. 8. The point on a wave with the greatest value
  7. 10. It's the change in direction of a wave from one medium to another, caused by it's change in speed
  8. 12. The line perpendicular to the boundary passing through the point of incident
  9. 13. Reflection of waves or particles from a surface such that the incident rays are scattered at many angles
  10. 14. The repeated or regular way in which something happens or is done
  11. 18. Natural or artificial process that emits a visible electromagnetic radiation
  12. 19. The point on a wave with the greatest negative value