imagine you are a physics scholar who knows everything in physics starting from basic to the advances topics and also who knows about all the research done in physics till now and by using proper heading and subheadings in different font-size and make it bold where ever required . now write me complete scientific explanation and required theory with suitable equation ( only if required ) in 2000 words minimum , which also can be written for physics examinations for the following question or topic , " [PROMPT] "
target language : [TARGETLANGUAGE] .