Nearsightedness, Farsightedness
A. Astigmatism |
B. Eye Dominance |
C. Focus |
D. Blind Spot |
E. Color Blindness |
F. Afterimages |
Answer: C. Focus
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If a star has an apparent magnitude of +5 and an absolute magnitude of -10, what can we say about that star? a. The star is farther than 10 parsecs away. b. The star is closer than 10 parsecs away. c. The star has a very large chromosphere. d. The star has a very large corona
e. The star is fainter than the Sun.
Object and image for a plane mirror occur
A) along the same plane. B) equal distances from the mirror. C) at right angles to each other. D) all of the above E) none of the above
We have not yet found meteoroids and meteorites derived from
A) comets. B) asteroids. C) Mars. D) the Moon. E) Venus.
Chemically, clean [non-polluted] air is
A) an element. B) a mixture. C) a compound. D) an isotope.