Question

tell the correct answer​

Answer 1

Answer:

1.sound produced by echo........

2.according to this law the angle of incidence is equal to angle of reflection

Answer 2

Answer:

1) Sound is produced when an object vibrates, creating a pressure wave. This pressure wave causes particles in the surrounding medium (air, water, or solid) to have vibrational motion. ... The human ear detects sound waves when vibrating air particles vibrate small parts within the ear.

Explanation:

2) The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.