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Question
In the biprism experiment, a source of monochromatic light is used for a certain distance between slit and eyepiece. When the distance between two virtual sources is changed from dA to dB, then the fringe width is changed from ZA to ZB. The ratio ZA to ZB is ______
Options
`sqrt(d_B/d_A)`
`(d_A/d_B)`
`(d_B/d_A)`
`(d_A/d_B)^2`
MCQ
Fill in the Blanks
Solution
In the biprism experiment, a source of monochromatic light is used for a certain distance between slit and eyepiece. When the distance between two virtual sources is changed from dA to dB, then the fringe width is changed from ZA to ZB. The ratio ZA to ZB is `underline((d_B/d_A))`.
Explanation:
Fringe width is given by z = `(lambdaD)/d`
∴ `Z_A/Z_B = d_B/d_A`
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