If You Want to Build a Telescope Having the Least

question 381

Multiple Choice

If you want to build a telescope having the least possible amount of chromatic aberration,you should use:

• A) a front lens that has been coated with a special material to reduce refraction.
• B) a front lens that is composed of two closely spaced lenses made of different kinds of glass.
• C) the thinnest front lens that you can obtain.
• D) mirrors instead of lenses.