why is 1/0 equal to infinity if we cross-multiply we get zero times infinity equals 1

Question

why is 1/0 equal to infinity   if we cross-multiply we get zero times infinity equals 1

kinggeorge · Answer

$$\large\frac{1}{0}\neq \infty$$It is undefined.

anonymous · Answer

ok  tx

kinggeorge · Answer

you're welcome.

anonymous · Answer

do you answer any physics questions

kinggeorge · Answer

Not usually, but I do have a basic knowledge of physics.

anonymous · Answer

this really puzzles me  KG /photons are massless particles correct BUT they possess energy e.g. gamma rays  now from e equals mcsqd. if they have zero mass  how can they possess energy

kinggeorge · Answer

That is a great question, and it involves come complex particle physics that I do not fully understand. However, check out this website. They have an explanation on this matter, as well as hundreds of other fascinating subjects. http://www.askamathematician.com/2010/09/q-how-can-photons-have-energy-and-momentum-but-no-mass/

anonymous · Answer

fantastic site kg /one more question and i leave you be ok   you are great man

kinggeorge · Answer

no problem.