Question

Conditions for Interference of Light ​

Answer 1

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To set up a stable and clear interferencepattern, two conditions must be met: The sources of the waves must be coherent, which means they emit identical waves with a constant phase difference. The waves should be monochromatic - they should be of a single wavelength.

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Answer 2

The following conditions are met for the interference of light waves. Required

$\underline{\bf \: 1. \: The \: difference \: in \: the \: art \: of \: waves }\\ \bf \underline{ obtained \: from \: both \: sources \: should \: }\\ \bf \underline{ remain \: stable - }$

if it does not happen then the diagonal pattern will not be permanent. For this, both the light source must be art linked, that is, it should be made from the same original source.

$\bf \underline{\: 2 . \: The \: frequency \: or \: wavelength \: \: of \: both} \\ \bf \underline{waves \: should \: be \: equal,- }$

if it is not so, the time will not be stable with the time and the permanent interaction pattern will not be received.

$\bf \underline {3. The \: dimensions \: of \: both \: waves \: must }\\ \bf \underline{be \: approximately \: equal, - }$

if not so, there will be sufficient intensity of light in the pan. Therefore, for the good contrast, the dimensions of both waves must be approximately equal, in such a situation, the vast fridge will be almost completely dark.

$\bf \underline{5. \: Both \: light \: sources \: must \: be \: very }\\ \bf\underline{ narrow - }$

in fact. A large light source is equivalent to a number of many light sources, so in the case of non-narrowing of light sources, both the sources are supported by multiple sources. Will be there. In this situation, each pair of sources has its own separate diagram. , The fridges will not be clearly visible due to overlapping in these interaction patterns.