Hello all, I'm starting to learn the math in physics and have the following thought experiment I want to use to work through something I own. The setup: There is a wall 10m from the center of a 1m diameter sphere. There is a 1m diameter light source casting a 1m diameter shadow on the wall (unsure if luminosity and distance from the sphere of the light source matter). Question 1: As the mass of the sphere increases, would the light bend and cause the shadow to shrink and eventually disappear or would the light scatter and fill in the shadow with lower energy light? Question 2a: If the shadow shrinks and disappears, what equation would calculate the mass required to make the shadow disappear? Question 2b: If the shadow fills in with lower energy light, does its luminosity increase in proportion to the sphere's mass? Question 2bi: If the answer to 2b is yes, what equation would show the relationship between the luminosity of the light in the shadow and the mass of the sphere? Question 2bii: If the answer to 2b is no, what equation would show the relationship between the luminosity of the light in the shadow and to its original luminosity?