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प्रश्न
Modern telescopes often use a concave mirror rather than a lens for the objective primarily because:
पर्याय
A mirror magnifies the image more than a lens
There is no chromatic aberration in a mirror
A mirror can form erect images while a lens cannot
A mirror requires a shorter focal length than any lens
MCQ
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उत्तर
Telescopes with mirror objectives are called reflecting telescopes. A key advantage is that there is no chromatic aberration in a mirror, since reflection does not depend on wavelength, unlike refraction through lenses.
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