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Light Diffractions

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Interference effects are produced at point P on a screen as a result of direct rays from a 781 nm source and reflected rays off the mirror, as shown below If the source is 56 m to the left of the
screen, and 0.87 cm above the mirror, find the distance y to the first dark band above the mirror.

Answer in units of mm.

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Interference effects are produced at point P on a screen as a result of direct rays from a 781 nm source and reflected rays off the mirror, as shown below If the source is 56 m to the left of the
screen, and 0.87 cm above the mirror, find the distance y to the first dark band above the mirror.

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Fig. 2
The fig.1 and fig.2 are ...

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