Across
- 2. mass/volume
- 4. liquid of different refractive index
- 7. when an atom absorbs energy, its electrons move to a
- 8. and cooling
- 11. sheets of ordinary glass bonded together with plastic
- 12. All frequencies or wavelengths of electromagnetic radi-ation
- 13. solid made up of particles not arranged in regular pattern
- 16. lines of fracture that extend outward from point of impact
Down
- 1. a measure of the light-bending ability of a medium
- 3. energy level
- 5. bright halo observed near border of particle immersed
- 6. glass strengthened by introducing stress through rapid
- 9. circular pattern of cracks that forms around a point of
- 10. destruction of matter caused by heat
- 14. piece of glass
- 15. lowest energy state of an atom