Q.

In Young’s double slit experiment, if the source of light changes from orange to blue, then  

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a

the distance between consecutive fringes will  decrease

b

the central bright fringe will become a dark fringe

c

the distance between consecutive fringes will increase

d

the intensity of the minimum will increase

answer is B.

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Detailed Solution

Distance between consecutive fringes is known as fringe width.

β=λDd

From orange to blue, wavelength decreases. Thus, fringe width decreases.

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