Explain an advantage a good refractor corrected for chromatic aberration has over any design of reflector of the same size
What will be an ideal response?
The lenses of the refractor can transmit more light without any central obstruction due to the secondary mirror, and thus form a shaper, crisper image with better contrast than can the reflector designs.
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The surface of Earth is an example of a free-float reference frame
Indicate whether the statement is true or false
The thin lens equation relates the focal length of a lens or mirror to
A. The object distance and the magnification B. The image distance and the magnification C. The object distance and the image distance D. The radius of curvature of both sides of a lens.
The cratered surfaces of Saturn's moons may look like our moons, but in reality they are made chiefly of ________
Fill in the blank(s) with correct word
A magician can make a candle look as if it is burning under water by focusing light from a candle flame burning in air directly on top of an underwater candle. To do this you want to use a (Hint: eliminate those that cannot work.)
A. concave mirror farther than one focal length from the burning candle. B. a convex mirror farther than one focal length from the burning candle. C. a biconcave lens farther than one focal length from the burning candle. D. a concave mirror closer than one focal length to the burning candle. E. a convex lens closer than one focal length to the burning candle.