Do the photons have mass?

  • #1
mysteriously
12
0
do the photons have mas???or just the momentum???or both??
 

Answers and Replies

  • #2
tom.stoer
Science Advisor
5,778
170


Photons have zero rest mass m=0. So the equation

E² = (mc²)² + (pc)²

relating energy E, rest mass m and momentum p reduces to

E = pc

Using Planck's constant h the energy E can be written in terms of frequency f as

E = hf
 

Suggested for: Do the photons have mass?

Replies
119
Views
3K
Replies
60
Views
3K
  • Last Post
Replies
3
Views
330
Replies
39
Views
2K
  • Last Post
Replies
10
Views
340
  • Last Post
Replies
16
Views
553
  • Last Post
Replies
2
Views
405
Replies
3
Views
257
  • Last Post
2
Replies
55
Views
921
Top