The energy of a photon?

  • I
  • Thread starter AyoubEd
  • Start date
  • #1
10
2
please look at he underligned formula. is it a axiom we have to ake for granted ?
 

Attachments

  • 55.PNG
    55.PNG
    12.1 KB · Views: 345

Answers and Replies

  • #2
Drakkith
Staff Emeritus
Science Advisor
21,136
4,974
No, we can and have measured this as far as I know.
 
  • #3
10
2
I think i got it
E=h.v
-De broglie : p=h/(the wace longitude:L)
hence:
E=h.c/L=p.c
 
  • #4
jtbell
Mentor
15,750
3,948
For relativistic particles, the general relationship between energy, momentum and mass is $$E = \sqrt {(pc)^2 + (mc^2)^2}$$ where m is the invariant mass (often called the "rest mass"). For photons, m = 0 which leads to E = pc.
 
  • #5
10
2

Related Threads on The energy of a photon?

  • Last Post
3
Replies
68
Views
19K
  • Last Post
Replies
5
Views
3K
Replies
6
Views
2K
  • Last Post
Replies
15
Views
3K
  • Last Post
Replies
8
Views
1K
  • Last Post
Replies
6
Views
1K
  • Last Post
Replies
2
Views
640
  • Last Post
Replies
10
Views
3K
  • Last Post
2
Replies
28
Views
8K
  • Last Post
Replies
10
Views
6K
Top