Across
- 2. one that does not allow light to pass through it
- 6. a dark region formed when light is blocked by an opaque object, creating an absence of light on the opposite side of the object
- 8. a spherical mirror where the reflecting surface is on the inward, curved side
- 13. a lens that's thicker in the middle than at its edges, causing parallel light rays to converge to a focal point
- 14. allows light to pass through it, but scatters the light in all directions, making it difficult to see clearly through it
- 15. the fundamental particle of light and electromagnetic radiation
- 17. the change in direction of a wave passing from one medium to another caused by its change in speed
- 19. the spreading of waves around obstacles
- 20. abrupt change in the direction of propagation of a wave that strikes the boundary between different mediums
Down
- 1. describes the path of light, often represented as a straight line with an arrow indicating the direction of energy flow
- 3. the direction of oscillation of a wave, specifically for transverse waves like light
- 4. the mirror-like reflection of waves, such as light, from a surface
- 5. a type of spherical mirror where the reflecting surface curves outwards, like the outside surface of a sphere
- 7. differ from mechanical waves in that they do not require a medium to propagate
- 9. the full range of electromagnetic radiation, organized by frequency or wavelength.
- 10. the phenomenon where the propagation velocity of a wave depends on its frequency or wavelength
- 11. a type of lens that causes parallel light rays to spread out (diverge) after passing through it
- 12. the reflection of light or other waves or particles from a surface such that a ray incident on the surface is scattered at many angles
- 16. allows light to pass through it without significant scattering, allowing you to see clearly through it
- 18. the point where parallel light rays converge after passing through the lens or reflecting off the mirror