Question: Imagine that the entire Sun collapses to a sphere of radius Rg such that the work required to remove a small mass m from the

Imagine that the entire Sun collapses to a sphere of radius Rg such that the work required to remove a small mass m from the surface would be equal to its rest energy mc 2. This radius is called the gravitational radius for the Sun. Find Rg . (It is believed that the ultimate fate of very massive stars is to collapse beyond their gravitational radii into black holes.)

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