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What is the approximate radius of the ce...

What is the approximate radius of the central bright differaction spot of light of wavelength `lambda=0.5 mum`, if focal length of the lens is 20 cm and radius of aperture of the lens is 5 cm ?

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To find the approximate radius of the central bright diffraction spot, we can use the formula for the radius of the central maximum in a circular aperture diffraction pattern: \[ R_0 \approx 0.61 \frac{\lambda f}{a} \] where: - \( R_0 \) is the radius of the central bright spot, - \( \lambda \) is the wavelength of light, - \( f \) is the focal length of the lens, ...
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