1. From E=mc2 , m= E/c2 "c" being huge, "m" should be small. 2. m= mo/√ [1-v2/c2] if v= c, then m should reach infinity. 3. Photons moving with speed of light are massless particles. All the above statements are confusing me. (1) doesn't match with (2), (2) doesn't match with (3). Please help. Thank you.