A person with limited accommodation is prescribed lenses of power –3.0 diopters for distant vision. Bifocal inserts are added to these lenses to allow vision at 50 cm. What is the power of the inserts?
a. –1.0 diopters
b. 2.0 diopters
c. 5.0 diopters
d. 50 diopters
e. This does not work with negative diopter distance lenses.
b
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A fringe shift occurs for every ______ wavelength movement of the adjustable mirror in a Michelson interferometer. A fringe shift occurs when the intensity goes from bright to dark or when it goes from dark to bright
a. half c. quarter b. eighth d. whole
Refer to Figure 6-13 Block A has a mass of 5.00 kg, block B has a mass of 3.00 kg and block C has a mass of 2.00 kg. The pulleys are ideal and there is no friction between block B and the table. What is the tension in the string connecting blocks B and C?
A. 20.6 N B. 13.7 N C. 38.3 N D. 25.5 N E. 34.3 N
Spherical Mirrors: The focal length of a concave mirror has a magnitude of 20 cm. What is its radius of curvature?
A. 10 cm B. 40 cm C. -40 cm D. 20 cm E. -20 cm
Neptune circles the Sun at a distance of 4.50 × 1012 m once every 164 years. Saturn circles the Sun at a distance of 1.43 × 1012 m. What is the orbital period of Saturn?
A) 304 years B) 121 years C) 109 years D) 88.6 years E) 29.4 years