Suppose a fish is observed below the surface of a lake. The distance the fish appears below the surface when looking down from above into the water (n = 1.33) is
A. less than the fish's actual distance.
B. equal to the fish's actual distance.
C. greater than the fish's actual distance.
Answer: A
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The thin lens equation relates the focal length of a lens or mirror to
A. The object distance and the magnification B. The image distance and the magnification C. The object distance and the image distance D. The radius of curvature of both sides of a lens.
Magnification is greater with a lens having a
A) high index of refraction. B) low index of refraction. C) same in each
The darkness of the night is due in part to the cosmological redshift, with the energy of the most distant objects diluted in the universal expansion
Indicate whether the statement is true or false
Suppose a uniform solid sphere of mass M and radius R rolls without slipping down an inclined plane starting from rest. The linear velocity of the sphere at the bottom of the incline depends on
A) the mass of the sphere. B) the radius of the sphere. C) both the mass and the radius of the sphere. D) neither the mass nor the radius of the sphere.