Category: Moderm Physics

Question Number 121092 by n0y0n last updated on 05/Nov/20 Terms of Service Privacy Policy Contact: info@tinkutara.com

Question Number 120132 by Dwaipayan Shikari last updated on 29/Oct/20 $$Supposeyouareinaimagnarytrainwhichtravelsatthehalf$$$$ofthespeedoflight.SupposeYouhaveabrotherwhois7year$$$$smallerthanyou.Hestandsontheplatformwhichyouhadleft.$$$$After1houroftravellingonthetrainyoucomebackonthe$$$$platform.Thenyouobservesomethingstrange.Youcansee$$$$yourbrotherlooksolder.Sowhatishisage?(Hewastenyears$$$$old)$$…

Question Number 53852 by estudiante last updated on 26/Jan/19 $$G_{\mu \nu }=R_{\mu \nu }-\frac{1}{2}{Rg}_{\mu \nu }+\mathbf{\Lambda }{g}_{\mu \nu }$$$$\mathrm{Wich}\mathrm{theory}\mathrm{of}\mathrm{modern}\mathrm{physic}\mathrm{belongs}\mathrm{this}\mathrm{equation}?$$$$\mathrm{and}\mathrm{what}\mathrm{does}\mathrm{it}\mathrm{mean}?$$ Terms of Service Privacy Policy Contact:…

Question Number 118633 by wsyip last updated on 18/Oct/20 $$$$$$(4.1){\psi }_{\mu }\left(\mathit{x}\right)\equiv ⟨\mathit{x},\mu \mid \psi ⟩$$$$(4.2){\psi }_{\mu }(\mathit{x}-\mathit{a})=[1-\mathit{a}\bullet \frac{\partial }{\partial \mathit{x}}+\frac{1}{2!}{(\mathit{a}\bullet \frac{\partial }{\partial \mathit{x}})}^2-\dots ]{\psi }_{\mu }\left(\mathit{x}\right)$$$$=exp(-\mathit{a}\bullet \frac{\partial }{\partial \mathit{x}}){\psi }_{\mu }\left(\mathit{x}\right)=⟨\mathit{x},\mu \mid exp(-i\frac{\mathit{a}\bullet \mathit{p}}{\overline{h}})\mid \psi ⟩$$$$\left(\mathrm{4}.\mathrm{3}\right)\:\:\:\mid\psi^{'} \rangle\equiv{U}\left(\boldsymbol{{a}}\right)\mid\psi\rangle\:\:\:;\:{U}\left(\boldsymbol{{a}}\right)\equiv{exp}\left(−{i}\boldsymbol{{a}}\bullet\boldsymbol{{p}}/\bar…

Question Number 52845 by peter frank last updated on 13/Jan/19 Answered by peter frank last updated on 14/Jan/19 Commented by peter frank last updated on…