The loss of accommodation that comes with aging is called
A. myopia.
B. hyperopia.
C. presbyopia.
D. retinalopia.
E. macularopia.
C. presbyopia.
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How is a CCD better than film for astronomical imaging?
A. Film images require developing, CCD images do not. B. CCDs are much more sensitive to light than film. C. It is more difficult to enhance the contrast and clarity with film images. D. All of these choices are correct.
A ray of light traveling in air makes a 63.0° angle with respect to the normal of the surface of a liquid. It travels in the liquid at a 39.2° angle with respect to the normal
Find the critical angle for total internal reflection for this interface.
Which physical unit represents acceleration in the British system?
A) -120 mi/s B) 40 km, SW C) 9.8 m/s2 D) 186,000 mi E) 32 ft/s2
The combined mass of a binary system is three solar masses. Star A is 1 AU and Star B is 2 AU from the center of mass. What are the masses of Star A and Star B, respectively?
a. 2.5, 0.5 b. 1, 2 c. 2, 1 d. 0.5, 2.5