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

Question

Quizplus · Accepted Answer

The question mentions "heavy materials," which likely refers to elements heavier than hydrogen and helium. The brightness of nebulae is related to their density, with denser regions appearing brighter. Option D states that the reflective bright nebulae are brighter than a low density source could produce, indicating that they are denser and likely contain more heavy materials. The other options do not provide a clear explanation for why reflective bright nebulae would contain more heavy materials.

The Reason Scientists Believe the Reflective Bright Nebulae Contain More