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 Community Discussion Question:
waves
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 27 Dec 2007 19:29:23 IST
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A source and a detector are placed at a distance d apart. A big cardboard is placed at a distance H = 1.414d from the source and the detctor . The source emits a wave of wavelength = d/2 which is received by the detector after reflection from the cardboard. it is found to be in phase with the direct wave received from the source. By what minimum distance should the cardboard be shifted away so that the reflected wave becomes out of phase with the direct wave?
For figure refer
HC VERMA , PAGE 354 , Q - 28
TELL ME WHAT CONDITION IS TO BE USED FR 'it is found to be in phase with the direct wave received from the source.'
WAITING!!
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27 Dec 2007 21:13:46 IST
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main concept is that waves have a phase shift of pi/2 on reflection on a DENSER medium. equate the phase difference and path difference to get the answer..........
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28 Dec 2007 14:08:16 IST
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batao yaar
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--
lol... |
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28 Dec 2007 14:13:33 IST
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yaar!! it is good..out of phase bole toh destructive intererence..interference..??? yes u can assume it..taking incident & reflected waves as prpogating in same direction and interfering..
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Don't Dream ..Do the dream...
Rock On ....
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