Uses of Multiple Reflection of Sound

State one use of reflection of sound.

The laws of reflection or refraction are the same for sound as for light. The index of refraction of a medium (for sound) is defind as the ratio of the speed of sound in air 343 m//s to the speed of sound in the medium. What is the index of refraction (for sound) of water (v=1498 m//s) ? What is the critical angle theta , for total reflection of sound from water?

State two laws of reflection of sound.

What do you mean by reflection of sound?

What do you mean by reflection of sound ? State one condition for the reflecton of a sound wave. Name a device in which reflection of sound wave is used.

The alga/protist used for the construction of sound proof room is

The objects around us are seen due to irregular reflection of light.

the minimum distance between the reflecting surface and source for listening the eco of sound is ( take speed of sound 340 m/s )

Evaluate the following using properties for multiplication to simplify the multiplication. 28 times (-48)

Evaluate the following using properties for multiplication to simplify the multiplication. (-59) times 102