Physics, asked by romilasrivastava, 1 year ago

for hearing an echo what is the minimum distance of reflecting surface from source?

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Answered by chand36

1

minimum distance will be 20 to 2000khz from reflecting surface from source

romilasrivastava: but the options are. 1. 32.2m. 2. 70.3m. 3. 7.3m. 4. 17.2m

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