Why are chromatic and spherical aberrations important factors in refracting telescopes, but not in reflecting telescopes?
Answer to relevant QuestionsA reflecting telescope with a large objective mirror can collect more light from stars than a reflecting telescope with a smaller objective mirror. What other advantage is gained with a large mirror? Explain. With an object at the focal point of a magnifying glass, the magnification is given by m = (25 cm) / f (Eq. 25.4). According to this equation, the magnification could be increased indefinitely by using lenses with shorter ...A college professor can see objects clearly only if they are between 70 and 500 cm from her eyes. Her optometrist prescribes bifocals (Fig. 25.23) that enable her to see distant objects through the top half of the lenses and ...A biology student uses a converging lens to examine the details of a small insect. If the focal length of the lens is 12 cm, what is the maximum angular magnification? The far point of a certain nearsighted person is 90 cm. (a) Which type of contact lenses, (1) converging, (2) diverging, or (3) (2) diverging, or (3) bifocal, should an optometrist prescribe to enable the person to see more ...
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