M
mubashirmansoor
Guest
As I was reading about photons, Some of the information was puzzeling for like; photons have no mass or that they dont have a kinetic energy.<br /><br />I understood having a zero mass at rest but when traveing with the speed of light the photons should gain a mass ( I think ) because of 2 universal evidences 1) The space-time curvature of a body such as a star causes the gravitational lensing and should the light have a mass to be affected by the mass of the sun? 2) The light is completely trapped in a black hole because of its extreamly intense gravity or the space-time wrapture so should it have a mass to be effected by the gravity?<br /><br />The next was about the Kinetic energy of light but if I understand the problem with the mass I will sure solve this one myself <img src="/images/icons/smile.gif" /> <br /><br />I'll be really thankfull for your answers. <br /><br />To make much more clear what I mean is that; If and if photons gain a mass due to their speed they probably have a kinetic energy too. right? <br />If so than E= (2ke/c^2)c^2 which means E=2ke which again means:<br />E=2(mv^2/2) where v=c so E= mc^2 And this shows that the mass is because of the speed and that the mass is variable at least in case of Electromegnatic rays...??<br />