Across
- 2. appear to radiate from a bright object.
- 4. sound that is deep and rich.
- 6. is checking for fractures
- 10. relating to sight
- 12. a stable subatomic particle with a charge of negative electricity
- 13. quantum mechanical effect that occurs in all materials
- 16. makes things visible.
- 17. an English scientist, developed a scientific theory to explain electromagnetic waves. An electromagnetic wave exists when the changing magnetic field causes a changing electric field
- 19. the SI base unit of electrical current
- 20. branch of science concerned with the nature and properties of matter and energy.
Down
- 1. interrelation of electric currents
- 3. type of magnetism in solids such as manganese oxide (MnO) in which adjacent ions that behave as tiny magnets
- 5. wavelength from about 800 nm to 1 mm
- 7. means to supply with energy or force.
- 8. form of magnetism whereby some materials are weakly attracted by an externally applied magnetic field
- 9. a disturbance that moves energy
- 11. high temperature
- 14. wavelength in the range 0.001–0.3 m
- 15. violet end of the visible spectrum
- 18. the force that attracts a body toward the center of the earth