Question

18 james maxwells contribution to astronomy was calculating the speed of waves through space. which statement about the speed of light (c) is true? a gravity decreases as objects move faster b light speeds can be added to each other c nothing travels faster than light d sound travels the same speed as light in space

Explanation:

• Option A: Gravity's relationship with object speed is not directly related to light speed; this is about gravity and motion, not light, so A is false.
• Option B: According to the theory of special relativity, light speed is constant in a vacuum and cannot be added like classical speeds, so B is false.
• Option C: A fundamental principle of physics (special relativity) states that the speed of light in a vacuum is the cosmic speed limit, and nothing with mass can travel faster than light, so C is true.
• Option D: Sound requires a medium to travel, and in space (a vacuum), sound cannot travel, while light can. Also, light speed is much faster than sound speed in any medium, so D is false.

Answer:

C. nothing travels faster than light