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A monochromatic light with wavelength 480.0 nm strikes a pair of narrow slits with spacing 0.100...

A monochromatic light with wavelength 480.0 nm strikes a pair of narrow slits with spacing

0.100 mm. The first dark fringe is formed on a screen at a vertical distance of 1.20 cm from the center of a screen placed in front of the slit.

How far away is the screen placed

What is the distance on the screen from the center of the interference pattern to the m =

3 bright fringe?

What is the shortest distance from the center where the intensity will reduce to 3/4th of

the maximum intensity?

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