ipho

why is it that the gravitational and the electromagnetic field cannot interact at quantum scales?

i think coz the basic interaction particles resp for the forces r different:10:

Look, according to the modern Quantum Mechanics (QM), we have four types of fundamental forces, namely:
1. Gravity
2. Electromagnetism
3. Strong Nuclear Force
4. Weak Nuclear Force
Now, when we go on increasing the energy of system, the forces start combing up. First, electromagnetism and weak force combine to form Electroweak force. Then, in GUT (Grand Unified Theory), the strong force is merged with Electroweak. Now, Gravity is left aside.
Gravity and strong-electro-weak force are not able to combine theoretically because the equations ruling gravity are found in General Theory of Relativity and the equations ruling former are found in QM. We still not have equations for gravity in QM because it is too weak. Moreover, the worlds created by GTR and QM are totally diff. Therefore, when we try to combine them disaster strucks and the equations don't remain equations at all
There is another theory, that the scientists are trying to develop that will merge both is Supergravity or SUGRA. Moreover, Theory of Everything (TOE) can do a lot of help.

good lakshya,
uve cleared a doubt,but when we talk of TOE we look into perspective different dimensions which out base the quantum ruling so TOE doesnt considers this case
well i have certainly learnt about supergravity but its equations are too complex to be explained by me clearly
also at "bang" and "crunch" scaling the interacting particles of weak and strong forces increase the stability of the system which opposes their unison. So what about that??????????/////