A pair of slits, separated by 0.150 mm, are illuminated by light with a wavelength of 643 nm. An interference pattern is observed on a scree

Question

A pair of slits, separated by 0.150 mm, are illuminated by light with a wavelength of 643 nm. An interference pattern is observed on a screen at 140 cm from the slits. Consider a point seen on the screen that is located 1.80 cm to the right of the central bright fringe. Will the point be a minimum (destructive) point, a maximum (constructive) point or somewhere in between

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Nick 4 years 2021-08-16T04:22:13+00:00 1 Answers 34 views 0

Answers ( )

  1. Calantha
    0
    2021-08-16T04:24:08+00:00
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    Answer:

    Explanation:

    slit separation d = .15 mm

    screen distance D = 1.4 m

    wavelength of light used λ= 643 x 10⁻⁹ m

    position of n th bright fringe x

    x = n x λ D / d

    1.8 x 10⁻² = n x 643 x 10⁻⁹ x 1.4 / .15 x 10⁻³

    1.8 x 10⁻² = n x 6 x 10⁻³

    n = 3

    So 3 rd bright fringe will be formed at a point 1.8 cm from the central bright fringe .

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