write important precaution which should be followed while performing an experiment for verification of the laws of reflection of sound
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the medium should be clear without any obstruction for the better results ....
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PRECAUTIONS
1) The length of pipe should be sufficient long .
2) Ear should be kept quite close to the open end of the pipe P² .
3) Angles should be measured carefully using protractor .
4) Table top should be horizontal . It should be checked with a spirit level . If it is not so , use suitable packings under the legs of the table .
1) The length of pipe should be sufficient long .
2) Ear should be kept quite close to the open end of the pipe P² .
3) Angles should be measured carefully using protractor .
4) Table top should be horizontal . It should be checked with a spirit level . If it is not so , use suitable packings under the legs of the table .
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