Light and Sound

3. a ray or shaft of light.
4. the biochemical emission of light by living organisms such as glow-worms and deep-sea fish.
7. the sound produced in a person's larynx and uttered through the mouth, as speech or song.
8. the fact or phenomenon of light, radio waves, etc. being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density.
10. The thing you can hear
12. the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone.
14. an instance of vibrating
15. the natural agent that stimulates sight and makes things visible.

1. an electronic device for increasing the amplitude of electrical signals, used chiefly in sound reproduction.
2. the throwing back by a body or surface of light, heat, or sound without absorbing it.
5. each of a pair of globular organs of sight in the head of humans and vertebrate animals.
6. to sound or the sense of hearing.
9. take in or soak up (energy or a liquid or other substance) by chemical or physical action.
11. a sound, especially one that is loud or unpleasant or that causes disturbance
13. the faculty or power of seeing.