- #1

mysteriously

- 12

- 0

do the photons have mas???or just the momentum???or both??

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter mysteriously
- Start date

- #1

mysteriously

- 12

- 0

do the photons have mas???or just the momentum???or both??

- #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

Share:

- 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

- Replies
- 55

- Views
- 921

- Replies
- 1

- Views
- 188