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InterviewSolution
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What are coherent sources? Why are coherent sources required toproduce interference of light? Give an example of interference of light in everyday life. In Young's double-slit experiment, the two slits are 0.03 cm apart and the screen is placed at a distance of 1.5 m away from the slits. The distance between the central bright fringe and fourth bright fringe is 1 cm. Calculate the wavelength of light used. |
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Answer» SOLUTION :`d = 0.03 cm = 0.03 xx 10^(-2)m` `D = 1.5 m` `B_4 = (4 LAMBDA D)/(d) = 1 xx 10^(-2) m` `lambda = (1 xx 10^(-2)d)/(4D)` `=(10^(-2) xx 0.03 xx 10^(-2))/(4 xx 1.5)` `= 0.005 xx 10^(-4) m`. |
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