337Photons have mass when they travel at the speed of light. Their rest mass is zero. So, considering that apply the formula m0/sqrt(1-(v2/c2) and you will find that it comes to 0/0. This means at the speed of light, photons can have any mass whatsoever, ranging from 0 to infinity (since 0/0 has infinite answers).
Thanx...
Asmita Chatterjee but how come photons even have mass wen they r travelling at the speed of light.how can they travel at such high velocity if they have mass.i dont understand....
Upvote·0· Reply ·2013-08-22 09:46:10
