Avirtual image produced by a lens is always
a. smaller than the object.
b. larger than the object.
c. located in the back of the lens.
d. located in front of the lens.

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?