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A laser of wavelenght 550 nm illuminates two indentical slits, producing an interference pattern on a...

A laser of wavelenght 550 nm illuminates two indentical slits, producing an interference pattern on a screen 90 cm away from the slits the bright bands are 1 cm apart, and the third bright bands of either side of the central maximum are `missing` in the pattern.

A) find the width and the seperation of the slits.

b) what is the phase difference for the light arriving at the second interference maximum to the right of the central maximum.

c)what is the phase difference between the light arriving at the second interference minimum to the right of the central maximum.

d) what is the ratio of intensity of the second order principal interference maximum ( m=2) to the central maximum

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