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string theory

what is string theory ? string theory is theoretical and it  is just like a mathematical tool other than classical physics like a cosmology . string theory suggest that smallest thing in not point particle instead of that it is a string which are one dimensional extended object . as in above fig the whole black part is universe and it is subdivided into small thread or string which is in blue color . small string connect together and make a anything around us . These string propagate through space and interact with each other , such string have charge and mass. they possess a vibration by which it communicate with each other . such vibrational state of the string include ;- 1. Gravition   2. Quantam mechanical particle 3. Gravitational force 1. Gravition; - it is hypothetical or imaginative theory they are expected to be massless it is belived            that something like gravitation and spin around space. 2. qua...
Quantum mechanics begin with a conflict of what exactly light is ? One experiment say that it is a wave in nature and another experiment says it is particle. After some experiment it come with a strange concept that light was both (particle and wave). Such a thought had started new thing in called quantum mechanics. One of the most important clues that light had to be more than just a wave was what’s known as The ultraviolet catastrophe . Now new thought begin how object radiate heat .Basis of this thought new law came out Stefan - Boltzmann law ,  that the total radiant heat energy emitted from a surface is proportional to the fourth power of its absolute temperature. Object actually radiate energy that covers a whole range of frequencies on the electromagnetic spectrum all different kind of light .on the basis of above law :- Black bodies –means a body which absorb light without reflecting any and radiate energy accordingly. not  all the energy coming f...