Mass and energy when traveling at near the speed of light

  • #1
I was reading about the speed of light and it says that no object can travel at the speed of light because the mass of the object increases as it moves faster. How is that possible?

Also if light travels at such a speed because it has no mass, then why does light get affected by gravity near black holes? Doesn't an object need mass to feel the effect of gravity?
 

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  • #2
bcrowell
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I was reading about the speed of light and it says that no object can travel at the speed of light because the mass of the object increases as it moves faster. How is that possible?

What do you mean by "How is that possible?" We observe that it happens, so evidently it's possible.

Also if light travels at such a speed because it has no mass, then why does light get affected by gravity near black holes? Doesn't an object need mass to feel the effect of gravity?

We have a FAQ about this: https://www.physicsforums.com/showthread.php?t=511173
 

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