1.

One microscope slide is placed on top of another with their left edges in contact and a human hair under the right edge of the upper slide. As a result, a wedge of air exists between the slides. An interference pattern results when monochromatic light is incident on the wedge.

Answer»

a dark FRINGE is seen at the left edges of slides
a BRIGHT fringe is seen at the edges of slides.
The fringes are straight of EQUAL thickness.
fringes are localized.

Solution :`2mut+lamda//2=(n+(1)/(2))lamda`
`2mu(xtheta)=nlamda`
`x=(nlamda)/(2mutheta)=(nlamda)/(2theta)""|n=0,x=0" dark fringe"|`


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