Across
- 3. Sound needs one to be propagated
- 6. geometric optic describes how it propagates through an optical system
- 7. It emits a light ray
- 8. It happens when light pass through a material without being absorbed
- 10. Sound cannot propagate through it
- 11. It shows wavelengths from gamma ray to radio waves
- 18. It has an inverse relationship to the wavelength
- 20. It's an imaginary perpendicular line to the surface reflecting a ray
Down
- 1. It's a transparent solid body that is used for dispersing light into a spectrum
- 2. Pure white has the maximum _____ and pure black the minimum one.
- 4. It usually reflects light rays
- 5. It divides two mediums
- 9. Radiation of a single frequency
- 12. In a wave is the point that shows the maximum negative displacement from the rest point
- 13. When a ray strikes a surface and its energy is transferred to the material
- 14. The part of the electromagnetic spectrum between visible light and radio waves
- 15. It's a property of a light wave determined by the frequency of the radiation
- 16. light that is beyond the purple end of the range of colours
- 17. The time that a particle need to take to his rest position
- 19. In a wave is the point that shows the maximum positive displacement from the rest point