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Kenny
Kenny asked in Science & MathematicsPhysics · 4 years ago

What is the wavelength of the light?

Two slits are measured to be 0.027 mm apart. When monochromatic light falls on the slits, the 4th order bright fringe falls at a 9.7 degree angle. What is the wavelength of the light?

0.980

1.13

1.14

0.860

1 Answer

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  • JupiterSky
    Lv 6
    4 years ago
    Favorite Answer

    d sinθ = mλ (for bright maxima)

    =>

    λ = (d sinθ)/m

    λ = [(2.7×10⁻⁵m)sin9.7°]/4

    λ = 1.14×10⁻⁶ m (114 nm)

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