X-ray question -- frequencies and energies 1. The problem statement, all variables and given/known data 1. Why does x-ray with higher frequency possess higher ionizing power and penetrating power ? 2. Will gamma ray with higher frequency possess higher ionizing power and penetrating power ? And is "gamma ray has no mass" a reason accounting for its low ionizing power ? 3. Then for alpha and beta radiation, will they possess higher ionizing power and penetrating power by increasing their speed ? Thank you. 2. Relevant equations Nil 3. The attempt at a solution 1. Is it because energy of it increase ? So it can hit air molecules more vigorously and possess higher KE and travel longer ? 2. I think mass should be one of the reasons just like that of alpha radiation. But my book says it is not. Only charge affect gamma 's ionizing power 3. I think yes ?