The Largest Refracting Telescope in the World Is the 102-Cm

question 235

Multiple Choice

The largest refracting telescope in the world is the 102-cm (40 in.) telescope at Yerkes Observatory, built in 1897. Why have no larger refracting telescopes ever been built?

• A) Larger lenses would have too much chromatic aberration.
• B) The sagging of larger lenses under their own weight would produce image distortion.
• C) The thickness of larger lenses would produce too much spherical aberration.
• D) Larger lenses would produce too much magnification.

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