ICSE Class 7 Answered

What is the mass of a photon, people say that its massless, if it was massless, then won't it accelerate to infinite velocity if it is ejected from a light bulb, because the bulb gives it some energy, and if it had mass, most of the energy would be used to accelerate that mass, as kinetic energy is (mv^2)/2 but as there is no mass,therefore, the v should increase to infinity, in order for the equation to still hold valid, therefore, the photon is either stationary with the frame of reference, or is moving at infinite velocity, but still we can see that light travels at the speed of light, so it should have some mass which limits it to move at that speed, and does its mass change when it's moving? because if its mass didn't change then it should have accelerated more than the speed of light, but it doesn't no matter how much energy you provide a photon, I,e photons of radio waves and photons of gamma rays all travel at the same speed. please clarify my doubt, and please don't tell me that I don't know special relativity and Lorentz transformation, I have asked all my teachers at school they tell me that I don't know special relativity so I won't be able to understand it... please give me the answer to this question.