Question

WE KNOW
The Gravitational mass helps to actract two body in universe..
The inertial mass protect against its acceleration due to force...
What kind of function of relativistic mass???
I want to say that when two photon travel.. Is there atraction among them as a gravitational mass..

Answer 1

we know relative mass of photon is zero . but real mass of photon doesn't zero . it means photon has some mass .there is no matter mass is too lower then electron.

according to Gravitational law of Newton, all massive body attract each other .
so, according to this photons also attract each other .