Discussion
Assertion (A) : The ceilings of cinema halls and concert halls are generally curved.
Reason (R) : Sound waves after striking a curved surface get reflected in all directions.
Answer: A
Both statements are true and the Reason is the correct explanation of the Assertion.
The ceilings of cinema and concert halls are curved so that sound striking them is reflected and spread to all parts of the hall, so that listeners everywhere hear evenly. This is the textbook application of the reflection of sound (NCERT class IX).
The Reason, that sound reflected from a curved surface spreads out in all directions, is the principle behind the design, so it explains the Assertion. The options treating either statement as false, or the link as unrelated, are therefore wrong.
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