Aberration: Spherical lenses suffer from
A. both spherical and chromatic aberration.
B. spherical aberration, but not chromatic aberration.
C. chromatic aberration, but not spherical aberration.
D. neither spherical nor chromatic aberration.
Answer: A
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What was Tycho Brahe's contribution to astronomy? a. He proved that Earth rotates on its own axis and revolves around the Sun
b. He designed the three laws of planetary motion. c. He discovered satellites around Jupiter, which proved Earth could move and keep its satellite. d. He described why each of the planets moved in uniform circular motion. e. He compiled detailed observations of the positions of the Sun, Moon, and planets over a period of 20 years.
A flask brim filled with water is on a weighing scale. If you float a piece of wood in it, after spillage away from the scale, the scale reading will be
A) less. B) the same. C) greater.
Why are Saturn's rings so noticeable?
A) They are made of metallic hydrogen. B) They are made of lots of fresh, bright icy particles from a recent breakup. C) The particles in the rings are highly polished from numerous collisions with other particles. D) They are made of nitrogen frost, like the bright surface of Triton. E) Saturn is so bright, the rings reflect a lot of light from both Saturn and the Sun.
Which of the following best describes the image of a convex mirror when the object's distance from the mirror is less than the absolute value of the focal point distance?
a. virtual, upright and magnification greater than one b. real, inverted and magnification less than one c. virtual, upright and magnification less than one d. real, inverted and magnification greater than one