A 1 cm object is placed 20 cm from a lens. The lens forms a real and inverted image of size 1.5 cm. What is the focal length of the lens?
A. 8.0 cm
B. 16 cm
C. 12 cm
D. 20 cm
E. 24 cm
Answer: C
Physics & Space Science
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Fill in the blank(s) with correct word
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What component is combined with the converging lens to construct a light microscope?
a. A focusing tool for the lens. b. A second, diverging, lens. c. A second, converging, lens. d. A concave mirror. e. A convex mirror.
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How many quark colors are there?
a. 1 b. 3 c. 6 d. none of the above
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An object is placed 21 cm from a concave lens of focal length 25 cm. What is the magnification?
A) -0.54 B) 0.54 C) -0.32 D) -0.22 E) 0.22
Physics & Space Science