Physics
To detect the obstacles in their path, bats produce:
- Infrasonic waves
- Ultrasonic waves
- Electromagnetic waves
- Radio waves.
Related Questions
The minimum distance between the source and the reflector in air, to hear an echo, is approximately:
- 10 m
- 17 m
- 34 m
- 50 m.
With respect to ultrasonic waves, which of the following statements is incorrect ?
- they travel undeviated through a long distance
- they have a speed greater than the speed of sound in a medium
- they are not easily absorbed in a medium
- they can be confined to a narrow beam
Infrasonic sound waves have a frequency :
- between 20 Hz to 10,000 Hz
- below 20 Hz
- above 20,000 Hz
- between 20 Hz to 20,000 Hz