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प्रश्न
A light wave of wavelength λ is incident on a slit of width d. The resulting diffraction pattern is observed on a screen at a distance D. If linear width of the principal maxima is equal to the width of the slit, then the distance D is
पर्याय
`(2lambda)/"d"`
`"d"^2/(2lambda)`
`(2lambda)^2/"d"`
`"d"/lambda`
MCQ
उत्तर
`"d"^2/(2lambda)`
Explanation:
The linear width of the principal maxima,
`beta = (2"D"lambda)/"d"`
It is given that, linear width of the principal maxima is equal to width of slit.
∴ d = `(2"D"lambda)/"d" => "D" = "d"^2/(2lambda)`
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