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Product description
When measuring the angular diameter of the giant red star Betelgeuse using the setup shown schematically in the figure, Michelson found that the interference fringes disappeared when the distance between the external mirrors M1 and M2 was 306.5 cm. Assuming that the effective wavelength of light from Betelgeuse was 5750 A , calculate the angular diameter of this star.
Additional information
Short solution. Format gif
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