Question

give reasons:(i) why ceiling of cinema hall are curved ? (II) why do we hear echo in empty room where as we do not hear any echo in room filled with different materials ?​

Answer 1

Explanation:

1st ceilings of cinema halls are curved so that sound waves get reflected at such an angle that they directly reach the audience after reflecting.

2nd

We hear an echo in an empty room n not in an room filled with objects as sound waves don't travel the distance required to produce an echo. Thank u mark Brainliest

Answer 2

Answer:

ceiling of cinema hall are curved as to prevent from eco.

as in empty room no object is present to absorb sound so it collide will wall of room and eco is provid whereas in filled room the sound energy is absorb by there substance and it don't collide..

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