Recent content by kavindra

@above Thanks for replying. I am an Industrial Engg. student which is allied to mechanical.

@HallsofIvy Thanks. That was very informative. please give ur suggestions about best science books here. https://www.physicsforums.com/showthread.php?p=1847764#post1847764

I know very little about relativity. Please suggest some book.

The list of **"Must-Read" Science Books**... Plz suggest Hi all. I am a first semester engineering student in India. I wish to know about the best books there are in science [especially physics]. I am reading Feynman lectures and erwin kreyszig- advanced engineering mathematics right now. The...

@Dave9600 No No No... I didn't mean that. I said if photons have zero mass, then they cann't be affected by gravitation. Actually photons have zero REST mass. But in motion, they too have mass.

@Dave9600 c- the speed of all EM radiations is the speed of all particles having zero rest mass and yes, photon travels with c from the moment it is created to the moment it is annihilated. There is no acceleration or deceleration. One of the many nonsensical [to me] things of relativity.

@CompuChip Why are photons affected by gravity of black holes if they have no mass? F=GMm/r2... So, if photons are massless, then they shouldn't be affected but on the contrary, they are sucked in.