InterviewSolution
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InterviewSolution
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In Young's double slit experiment, the two slits act as coherent sources of equal amplitude 'a' and of wavelength lambda. In another experiment with the same setup the two slits are sources of equal amplitude 'a' and wavelength lambda but are incoherent. The ratio of intensities of light at the mid point of the screen in the first case to that in the second case is .... |
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Answer» `2:1` `I_(max) = (a + a)^(2) = 4a^(2)` Now, when sources are INCOHERENT, no interference occurs, intensity at mid point is `I=I_(1)+I_(2) RARR a^(2)+a^(2)=2A^(2)` `:. (I_(max))/(I)=(4a^(2))/(2a^(2))=2:1` |
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