Across
- 4. of or relating to the interrelation of electric currents
- 6. operating by or producing electricity
- 8. he quality of a sound governed by the rate of vibrations
- 9. vibrations that travel through the air or another medium
- 10. the process by which a beam of light or other system
- 11. the strength and vitality required for sustained
- 12. the distance between
Down
- 1. transport
- 2. transverse
- 3. an instrument for converting sound waves into electrical energy
- 5. diminution in the density of something,
- 7. talk back
- 13. move or cause to move continuously and rapidly
- 14. the natural agent that stimulates sight and makes