Which of the following kinds of waves is/are audible?
1. Infrasonic waves
2. Ultrasonic waves
Choose the correct code.
1
Neither 1 nor 2
2
Both 1 and 2
3
Only 1
4
Only 2
Which of the following kinds of waves is/are audible?
1. Infrasonic waves
2. Ultrasonic waves
Choose the correct code.