Question:
Assertion (A): We cannot hear the sound of a bell ringing in a closed jar after most of the air is pumped out.
Reason (R): Sound requires a medium to travel.
Choose the correct option:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true. [Pg. No. 188]
Answer:
Verified
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
Explanation: Sound cannot travel in vacuum because it needs a material medium like air.
When most of the air is pumped out of the jar, the sound of the bell cannot be heard.
