4 A small mirror of area A and mass m is suspended in a

Last updated: 6/8/2023

4 A small mirror of area A and mass m is suspended in a vertical plane by means of a weightless string A beam of light of intensity I falls normally on the mirror and the string is deflected form the vertical through a very small angle a Assuming the mirror to be perfectly reflecting obtain an expression for a 21A I c mg c mg 31 c mg a C b d None of the above 21 C mg