Across
- 3. The point where rays of light converge.
- 5. The band of colors produced when light passes through a prism.
- 6. A type of lens or mirror that curves outward.
- 7. The adjustment of an optical device to create a sharp image.
- 8. A reflective surface that forms images.
- 10. The bouncing back of light from a surface.
- 13. An imaginary line perpendicular to a surface.
- 16. Electromagnetic radiation visible to the human eye.
- 18. A type of lens or mirror that curves inward.
- 19. A representation of an object formed by light.
- 20. A unit for measuring the brightness of light.
Down
- 1. The separation of light into colors.
- 2. A group of light rays traveling together.
- 4. A transparent optical element that disperses light into a spectrum.
- 9. The bending of light as it passes through a medium.
- 11. The branch of physics studying light and vision.
- 12. The measure formed by two rays with a common endpoint.
- 14. The rate at which light travels, approximately 300,000 km/s.
- 15. A transparent object used to refract light and focus images.
- 17. A narrow beam of light.