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When two waves of intensities l1 and l2 ...

When two waves of intensities `l_1 and l_2` coming from coherent sources interfere at a point P, where phase difference is `phi`, then resultant intensity `(l_(res))` at point P would be

A

`l_(res)=l_1-l_2-2sqrt(l_1l_2)`

B

`l_(res)=l_1+l_2+2sqrt(l_1l_2)cosphi`

C

`l_(res)=l_1+l_2-2sqrt(l_1l_2)cos^2phi`

D

`l_(res)=(l_1)^2+(l_2)^2-2(l_1l_2)cos^2phi`

Text Solution

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The correct Answer is:
B
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AAKASH INSTITUTE ENGLISH-Mock Test 37-Example
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  5. In Young's double sit experiment two light sources when placed at a di...

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  9. In a single slit diffraction pattern

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  10. A light of wavelength fall on a plane surface at an angle of incidence...

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  11. In Young's double slit experiment:

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  12. In YDSE, a glass slab of refractive index, mu= 1.5 and thickness 'l' i...

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  13. The diffraction effect can be observed in

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  14. In single slit experiment, if green light is instead of orange light t...

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  15. The amplitude factor of resulting wave, formed by superposition of two...

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  16. The average value of cos^2(phi/2) in one cycle is

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  17. Two sources with intensity 4I0 , and 9I0 , interfere at a point in med...

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  18. The path length difference between two waves coming from coherent sour...

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  19. Two waves of equal amplitude a from two coherent sources (S1 & S2) int...

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