1.

In a Young's double slit experiment, the separation between the slits is 0.15 mm. In the experiment, a source of light of wavelength 589 nm is used and the interference pattern is observed on a screen kept 1.5 m away. The separation between the successive bright fringes on the screen is

Answer»

`5.9` mm
`3.9` mm
`1.9` mm
`2.3` mm

Solution :Width of FRINGE,
`BARX=(lambdaD)/(d)`
`=(589x10^(-9)xx1.5)/(1.5xx10^(-4)m)`
`=589xx10^(-5)m`
`=5.89xx10^(-3)m`
`=5.9 mm`


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