Question

in ydse light of wavelength 6000A is used to get an interference pattern on screen at 2m.find fringe width if distance between the sources is 2.4mm.also find fw when screen is moved toward source by50cm.​

Answer 1

Answer:

When slit are of equal width, if I

o

is intensity of light then,

I

max

=I

o

+I

o

+2

I

o

I

o

=4I

o

I

min

=I

o

+I

o

−2

I

o

I

o

=0

Case 2: When slit are of unequal width, intensity from one slit would increase to twice then,

I

newmax

=2I

o

+I

o

+2

2I

o

I

o

=5.83I

o

I

newmin

=2I

o

+I

o

−2

2I

o

I

o

=0.17I

o

Therefore, intensities of both the maxima and the minima increase

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