Across
- 4. Named with the Greek letter φ
- 5. Phenomenon which occurs when a ray of light strikes a surface
- 6. Needed to have the phenomenon of diffraction
- 7. Property of a light wave determined by the frequency of the electromagnetic radiation
- 9. The property of waves which is defined as the distance between the peaks of two waves
- 11. The bending of a light ray when it passes from a medium to another one
- 13. Solid, liquid, gas or plasma... able to propagate energy waves
- 15. The "thing" that emits a light ray
- 16. Phenomenon which occur when a wave encounters an obstacle or a slit
- 18. The amount of energy carried by a wave
- 21. Its unit of measure is second and =1/f
Down
- 1. A surface associated with a propagating wave and passing through all points in the wave that have the same phase
- 2. It divides two mediums
- 3. The separation of electromagnetic radiation into constituents of different wavelength
- 8. index The speed of light in vacuum divided by the speed of light in the medium
- 10. Physical process where a radiation deviates from a straight trajectory because of the collision with an other particle
- 12. The imaginary line perpendicular to the surface reflecting the light
- 14. The object that reflects light
- 17. Has an inverse relationship to the wavelength λ (lambda)
- 19. Something that happens regularly and repeatedly
- 20. Lots of physicists (Newton, Huygens...) studied its real nature and found different answers