Across
- 4. a device that generates an intense beam of coherent monochromatic light (or other electromagnetic radiation) by stimulated emission of photons from excited atoms or molecules.
- 7. spectrum the range of wavelengths or frequencies over which electromagnetic radiation extends.
- 8. the throwing back by a body or surface of light, heat, or sound without absorbing it.
- 9. a substance that does not readily allow the passage of heat or sound.
- 10. the speed of something in a given direction.
- 11. the process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.
Down
- 1. the maximum extent of a vibration or oscillation, measured from the position of equilibrium.
- 2. the rate at which something occurs or is repeated over a particular period of time or in a given sample.
- 3. the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
- 5. a vehicle's capacity to gain speed within a short time.
- 6. the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.