The reason scientists believe the reflective bright nebulae contain more heavy materials than the emission bright nebulae is that ________.
A)they reflect more colors than the emission nebulae
B)they glow brighter than an energy emission source could produce
C)they are brighter than a low density source could produce
D)they are dimmer than a low density source could produce
E)they are blue,and that color is associated with carbon

Question

Quizplus · Accepted Answer

The brightness of a nebula is directly related to its density. If the nebula is low density, it will not be able to produce as much brightness as a high density nebula. The reflective bright nebulae are brighter than a low density source could produce, indicating that they contain more heavy materials.

The Reason Scientists Believe the Reflective Bright Nebulae Contain More