Across
- 9. what type of wave can travel only through matter?
- 10. what type of electromagnetic wave is used in PET scans?
- 11. what is the change in direction of a wave when it travels by the edge of an object or through an opening
- 13. what law states that when a wave is reflected from a surface, the angle of reflection is equal to the angle of incidence?
- 14. what is the transfer of energy by a wave to the medium through which it travels?
- 16. light passes through glass windows because of what?
- 17. what type of electromagnetic wave is used in fluorescent light bulbs?
- 18. what is the number of wavelengths that pass by a point each second?
- 19. what is the change in the frequency of a carrier wave called?
- 20. what type of energy is carried by electromagnetic waves?
Down
- 1. what type of wave does its disturbance face perpendicular to the direction the wave travels?
- 2. what type of wave can travel through matter and empty space?
- 3. what type of wave is a sound wave?
- 4. what type of electromagnetic wave has a wavelength shorter than a microwave but longer than light?
- 5. what is the distance between the crest and the trough of a wave?
- 6. what is the change in direction of a wave that occurs as the wave changes speed when moving from one medium to another?
- 7. what type of wave has the lowest frequency and energy on the electromagnetic spectrum?
- 8. what is the change in the amplitude of a carrier wave called?
- 12. you can see yourself in a mirror because of what?
- 15. what is the distance from one point on a wave to the same point on the next wave?