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ARPN Journal of Science and Technology >> Volume 7, Issue 2, November 2017

ARPN Journal of Science and Technology

Photon: Mass less or Massive?

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Author S. Sahoo, A. D. Roy, S. Mandal
ISSN 2225-7217
On Pages 413-417
Volume No. 4
Issue No. 7
Issue Date August 01, 2014
Publishing Date August 01, 2014
Keywords Photon; special theory of relativity; general theory of relativity; wave-particle duality; cosmic microwave background radiation.


The existence of the mass of a photon is one of the most intriguing issues in physics. According to Einsteinís special theory of relativity (STR), photon is a mass less particle and travels at the speed of light. But some scientists claim that photon has a nonzero rest mass however small it may be. Although up to now there has been no conclusive evidence of a finite mass for the photon, there are stringent upper bounds on the size of it.

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