Question

If the reflected sound and incident sound at the angle of 90degree ,find the angle of incident sound.List any one precautions that should be taken while performing this experiment.

Answer 1

we know that angle of incidence is equal to the angle of reflection then,
angle i+ angle r =90
but angle i =angle r
then we get, angle i= angle r= 45
the precautions should be taken was that the cardboard box used as pathway of sound should be kept,5cm away from the drawing board.................
if you liked it then please make this brainliest

Answer 2

Laws of Reflection of Sound

The reflection of sound is similar to the reflection of light as it follows the laws of reflections, where the angle of incidence is equal to the angle of reflection and the incident sound, the reflected sound and the normal lie in the same plane. Sound bounces off the surface of solid or a liquid like a billiard ball bounces off the sides of the table. In order for reflection of sound to occur, the surface can be either rough or polished and of considerably large size.
Laws of Reflection of Sound

The angle of incidence is always equal to the angle of reflection.The incident sound wave, the reflected wave and the normal at the point of incidence are in the same plane.