what are the conditions for sustained interference?
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. Which are of the following is a cause for rural and urban
poverty?
(a) Low resource box
(b) Unfavourable climate
(c) Lade of natural resources
(d) All of the above.
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Conditions for sustained interference pattern:
The two sources of light must be coherent with same frequency or wavelength and with same phase or constant phase difference.
The two sources should preferably have the same amplitude.
The two sources must be very close to each other.
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