Reflecting telescope objectives here on Earth do not have a problem with
a. "seeing".
b. diffraction.
c. color fringes on the image.
d. All of the other choices are correct.
c
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A 4.00 kg hollow sphere (I = 2/3 
) is spinning with an angular velocity of 10.0 rad/s. The diameter of the sphere is 20.0 cm. The angular kinetic energy of the spinning sphere is
A. 1.75 J. B. 1.50 J. C. 1.33 J. D. 0.90 J. E. 0.75 J.
A baseball is located at the surface of the earth. Which statements about it are correct? (There may be more than one correct choice.)
A) The earth exerts a much greater gravitational force on the ball than the ball exerts on the earth. B) The ball exerts a greater gravitational force on the earth than the earth exerts on the ball. C) The gravitational force on the ball due to the earth is exactly the same as the gravitational force on the earth due to the ball. D) The gravitational force on the ball is independent of the mass of the ball. E) The gravitational force on the ball is independent of the mass of the earth.
The electric field between oppositely-charged parallel plates is
A) uniform. B) stronger at the ends. C) composed of field lines curved in opposite directions. D) none of the above
If a person's eyeball is too long from front to back, the person is likely to suffer from
A) spherical aberration. B) chromatic aberration. C) nearsightedness. D) farsightedness. E) astigmatism.