Questions received from a curious UG student

I have several doubts in physics.Would you like to answer me please?The following are the doubtful questions I have - 1.What is meant by 'Radic'? 2.What is a 'parallelopiped'?Is it a 3-dimensional parallelogram? 3.Why does no electric current flow through vacuum? 4.When several transparent materials are kept above each other, the resultant behaves like an … Continue reading Questions received from a curious UG student