Shortcut Methods
Here are the shortcut methods and tricks to solve the numericals.
1. Fringe width for Young’s double-slit experiment:
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Calculate the fringe width using the formula: Fringe width (W) = λD/d
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W is the fringe width,
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λ (lambda) represents the wavelength of light,
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D is the distance between the slits and the observation screen,
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d represents the separation between the two slits.
2. Fringe spacing:
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Fringe spacing = λD/d
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Where:
λ (lambda) is the wavelength of light, D represents the distance between the slits and the screen D d is the slit separation.
3. Circular-aperture diffraction formula:
- Calculate the angular radius of the first dark ring using the formula: θ = 1.22 λ/D
θ represents the first dark ring (angular radius),
λ denotes the wavelength of light used,
D represents the diameter of the circular aperture.
