Give reasons for the following : (a) Astronomers prefer to use telescopes with large objective diameters to observe astronomical objects. (b) Two identical but independent monochromatic sources of light cannot be coherent. (c) The value of the Brewster angle for a transparent medium is different for lights of different colours
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a)for the ability to see or image dimmer objects and the ability to resolve finer details and study of the universe. I hope this will help you.
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