Mass and energy when traveling at near the speed of light

  • #1

Main Question or Discussion Point

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?
 

Answers and Replies

  • #2
bcrowell
Staff Emeritus
Science Advisor
Insights Author
Gold Member
6,723
423
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
 

Related Threads on Mass and energy when traveling at near the speed of light

Replies
22
Views
8K
Replies
1
Views
539
Replies
2
Views
5K
Replies
9
Views
1K
  • Last Post
Replies
13
Views
6K
  • Last Post
3
Replies
69
Views
4K
  • Last Post
Replies
15
Views
6K
Replies
31
Views
3K
  • Last Post
Replies
18
Views
526
  • Last Post
Replies
8
Views
2K
Top