What are the main differences among the following refracting telescopes: an astronomical telescope, a Galilean telescope, and a terrestrial telescope?
Answer to relevant QuestionsWhy are chromatic and spherical aberrations important factors in refracting telescopes, but not in reflecting telescopes? A person with nearsightedness wishes to switch from regular glasses to contact lenses. Should the contact lenses have a stronger or a weaker prescription than the glasses? Explain. An eyeglass lens with a power of + 2.8 D allows a far-sighted person to read a book held at a distance of 25 cm from her eyes. At what distance must she hold the book to read it without glasses? An object is placed 10 cm in front of a converging lens with a focal length of 18 cm. What are (a) The lateral magnification and (b) The angular magnification? A compound microscope has a distance of 15 cm between lenses and an objective with a focal length of 8.0 mm. What power should the eyepiece have to give a total magnification of – 360x?
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