While performing an experiment on verifying the laws of reflection of sound, the 'reflected sound' can be detected better by keeping one ear :
(1) near the end of the tube and keeping the other ear closed
(2) near the end of the tube and keeping the other ear open
(3) at about 5 cm from the end of the tube and keeping the other ear closed
(4) at about 5 cm from the end of the tube and keeping the other ear open

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Solution

The reflected sound can be detected better by keeping one ear near the end of the tube and the other ear closed. Because by doing so, other environmental sounds can be excluded and one can focus only on the sound coming from the tube.

Hence, the correct answer is option 1.

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The reflected sound can be detected better by keeping one ear near the end of the tube and the other ear closed. Because by doing so, other environmental sounds can be excluded and one can focus only on the sound coming from the tube. Hence, the correct answer is option 1.

The reflected sound can be detected better by keeping one ear near the end of the tube and the other ear closed. Because by doing so, other environmental sounds can be excluded and one can focus only on the sound coming from the tube.

Hence, the correct answer is option 1.