Two beams of light having intensities I and 9I interfere to produce a fringe pattern on a screen. The phase difference between the beams is π2 at point A and p at point B. Then the difference between the resultant intensities at A and B is

At point A, resultant intensity IA=I1+I2=I+9I=10I and at point B, IB=I1+I2+2I1I2cosπ=10I-6I=4ISo difference=10I-4I=6I

Two beams of light having intensities I and 9I interfere to produce a fringe pattern on a screen. The phase difference between the beams is π2 at point A and p at point B. Then the difference between the resultant intensities at A and B is

At point A, resultant intensity IA=I1+I2=I+9I=10I and at point B, IB=I1+I2+2I1I2cosπ=10I-6I=4ISo difference=10I-4I=6I

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Two beams of light having intensities I and 9I interfere to produce a fringe pattern on a screen. The phase difference between the beams is $\frac{π}{2}$ at point A and p at point B. Then the difference between the resultant intensities at A and B is

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$A t p o i n t A, r e s u l \tan t i n t e n s i t y I_{A} = I_{1} + I_{2} = I + 9 I = 10 I$

$a n d a t p o i n t B, I_{B} = I_{1} + I_{2} + 2 \sqrt{I_{1} I_{2}} \cos π = 10 I - 6 I = 4 I$

$S o d i f f e r e n c e = 10 I - 4 I = 6 I$

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Two beams of light having intensities I and 9I interfere to produce a fringe pattern on a screen. The phase difference between the beams is π2 at point A and p at point B. Then the difference between the resultant intensities at A and B is

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Two beams of light having intensities I and 9I interfere to produce a fringe pattern on a screen. The phase difference between the beams is $\frac{π}{2}$ at point A and p at point B. Then the difference between the resultant intensities at A and B is