if photon has zero rest mass but posses momentum"P=M.V".This means it has mass at"C"?

Question

then why a powefull lazer beam can not move a small mass.

Secondly how anything that travel at "C" can have a mass ?

please note light propulsion works on combustion of air not momenum

Answer 1

Photons are massless, but then do possess momentum.
A photon's momentum comes from the energy it carries.
E = mc^2 + pc
Where E is the photon's energy, m is its rest mass (= 0), c is the speed of light, and p is the momentum.
p = E / c

It is possible to use the momentum of light to move objects. Since momentum must be conserved, a photon's momentum is transferred to the object in a collision, thereby applying a force and causing an acceleration. The Energies (and this momentums) of single photons are very small, and thus their momentum changing effects on other objects are also very small and difficult to measure under normal circumstances.

Nothing with mass can ever travel at, or exceed, the speed of light. To accelerate a mass to the speed of light it would take an infinite amount of energy, and in the entire universe, there is not an infinite amount of energy.

Answer 2

Any thing at rest has zero velocity. So Photons at zero velocity have zero momentum.
However; Photons at rest dont exist. Therefore they exist only in a state of motion hence they have energy of motion.Since they collide with atoms than anything that collide is considered mass.
The mass limit of the photns has been experimentally verified to a highdegree of accuracy. The mass that a light particle contains is really invariant.That means it does not following Einstein's mass change with velocity formula relationship.

Answer 3

You are assuming that a photon is matter, it's not.
Nor is it a wave. We only use these two descriptions to fit some of the facts we have. More accurately, it is a probability standing-waveform. PS learn to spell or type before asking 'big boy' questions

Answer 4

looks to me, asking what a soul weighs is comparable to asking how a lot that music on your iPod weighs. by way of the indisputable fact that's training, it weighs not something in any respect -- that's in simple terms an association of alternative issues that do have mass, subsequently electrons trapped on a floating silicon gate.

Answer 5

No. It can impart momentum not by its mass but by the electric and magnetic fields.

Answer 6

im not sure.
i think that c is only a constant on tuesdays and bank holiday mondays.
i hope that clears it up for you.

Answer 7

ask photonlol