How can we said that photon does not have a mass?

  • Thread starter Thread starter aloshi
  • Start date Start date
  • Tags Tags
    Mass Photon
Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
Sign up Log in
1 reply · 2K views
aloshi
Messages
79
Reaction score
0
how can we sad that photon does not have a mass? in my book they are a piece that there write at the photon influence of gravitation?
 

Discussion

Physics news on Phys.org
aloshi said:
how can we sad that photon does not have a mass? in my book they are a piece that there write at the photon influence of gravitation?

Hi aloshi! :smile:

Mass is energy, energy is mass.

A photon does not have rest-mass, but it does have mass.

A box into which photons are inserted (from outside) weighs more, and exerts more gravity.
 

Similar threads

High School Can we say a photon doesn't exist until the wavefunction collapses?

  • Kavi
  • · Replies 16 ·
  • Quantum Physics
Replies
16

Undergrad How can a photon have no mass if it has momentum?

  • jaurandt
  • · Replies 7 ·
  • Quantum Physics
Replies
7

Graduate Why does the photon have no mass?

  • Lone Voice
  • · Replies 14 ·
  • Optics
Replies
14

Undergrad How can we say we do work in walking up stairs or similar?

  • alkaspeltzar
  • · Replies 27 ·
  • Mechanics
Replies
27

Graduate Is the Photon Mass Really Zero or Does It Have a Finite Value?

  • vijayst
  • · Replies 6 ·
  • Optics
Replies
6

Graduate How can we detect photons without mass?

  • Keiran OConnor
  • · Replies 5 ·
  • Optics
Replies
5

Graduate Does a photon have rest mass, and does it have mass while moving?

  • aleemudasir
  • · Replies 35 ·
  • Special and General Relativity
2
Replies
35

Insights How Can We Jump When the Ground Does No Work?

  • Orodruin
  • · Replies 29 ·
  • Mechanics
Replies
29

How can we solve for both T₂ and m in a system with multiple unknowns?

  • rtareen
  • · Replies 7 ·
  • Introductory Physics Homework Help
Replies
7

Undergrad How can we prove that the capacitance does not depend on charge?

  • jaumzaum
  • · Replies 16 ·
  • Electromagnetism
Replies
16