Two identical silver spheres of mass m and radius r are placed a distance R (sphere 1) and 2R (sphere 2) from the Sun respectively.The ratio of the gravitational force exerted by the Sun on sphere 1 to the pressure of solar radiation on sphere 1 is T1; the ratio for sphere 2 is T2.The ratio of T2 to T1 is:
A)0.25.
B)0.50.
C)1.0.
D)2.0.
E)4.0.

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The Answer of Two identical silver spheres of mass m and radius r are placed a distance R (sphere 1) and 2R (sphere 2) from the Sun respectively.The ratio of the gravitational force exerted by the Sun on sphere 1 to the pressure of solar radiation on sphere 1 is T1; the ratio for sphere 2 is T2.The ratio of T2 to T1 is:
A)0.25.
B)0.50.
C)1.0.
D)2.0.
E)4.0.

Two Identical Silver Spheres of Mass M and Radius R