# Interference in YDSE

Let us take a YDSE (Young's Double Slit Experiment) set-up as shown:

If monochromatic source is emitting a light with power 'P'. Then find the position $x$ (as shown) of this source such that the contrast of the fringe pattern observe on screen is best possible.

Details and Assumptions

Contrast at any point on screen is defined as the difference in maximum and minimum intensity. If difference is more than contrast is also better, and we can easily detect the fringe pattern with our eyes.

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