The have to have at least some mass because they are particles that make up our physical universe
2006-06-08 21:34:59 · 8 answers · asked by selrachcassi 1 in Science & Mathematics ➔ Physics
Go and slap the person who told you that they have no mass.
2006-06-08 22:20:15 · answer #1 · answered by jimmy_siddhartha 4 · 0⤊ 1⤋
Electrons have mass,but photons have zero rest mass.
Well you can talk about electrons making the universe and in a sense are particle like.Photons too behave as particles but just carry energy .But mass and energy are equivalent so you can assign some mass to them as well
= h/wavelength
h= Planck's constant
Rest mass of photons is zero but you can't find them resting but always travelling at speed of light and carrying energy.
2006-06-09 04:53:12 · answer #2 · answered by santosh k 3 · 0⤊ 0⤋
electrons have mass i.e 9.1x10^-31kg
photons have no rest mass ,they only have relativistic mass i.e when they are moving with the speed approaching the speed of light. If we made to stop photon it converts into an electron and positron (pair production) which suggests that rest mass of photon is zero and also clears that all the mass of photon is kinetic in nature. Pair production also confirms the E=MC^2 Both mass and energy are interconvertible.
2006-06-09 06:34:49 · answer #3 · answered by zahid 2 · 0⤊ 0⤋
Mass is a measurement of weight, and weight is defined by gravity, or the natural law of large objects attracting small objects to them. but if something were perpetually moving at the speed of light, the amount that gravity would affect it would be so small as to be infitismaly miniscule, but it is there. It is said that these sub-atomic things have no mass because relative to the things around them, they dont. It would take an entirely different scale of measurement to graphically represent the amount of mass a photon has at rest (which is probably not calculatable) relative to neutrons, for example. Since it is constantly moving at the speed of light (C), it is damn near impossible to observe, let alone measure.
2006-06-09 05:26:02 · answer #4 · answered by Bawn Nyntyn Aytetu 5 · 0⤊ 0⤋
Electrons have mass. But photons do not have mass. But they do have energy which is equivalent to a mass. When energy is quantised it behaves exactly like particles having mass.
2006-06-09 06:22:39 · answer #5 · answered by Pearlsawme 7 · 0⤊ 0⤋
electrons have mass 1836 times less then protons but they have about 9.11E-31 Kg.
Photons have no mass at rest but free photons have a mass that can be calculated by using E=mc^2 and E=h.f. They have mass but it's way to small
2006-06-09 05:32:17 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Electrons, do HAVE mass.
Photons donot have rest mass, but they do HAVE relativistic mass of h(nu)/c as measured in a frame where (nu) is the frequency observed in that frame.
2006-06-09 04:40:58 · answer #7 · answered by debraj_roy_dr 2 · 0⤊ 0⤋
Lol I liked how you answered your own question. give yourself ten pts lol.
2006-06-09 04:41:28 · answer #8 · answered by xx_muggles_xx 6 · 0⤊ 0⤋