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Question
Diffraction spreading for a flashlight is insignificant compared with other limitations in its optics, such as spherical aberrations in its mirror. To show this, calculate the minimum angular spreading of a flashlight beam that is originally 5.00 cm in diameter with an average wavelength of 600 nm.
$8.39\times{10^{-4}}^\circ$
Note: The working in the video is correct but the final answer in the video needs to be divided by $\pi$. The final answer here and in the calculator screenshot are correct.
Solution Video