Question Answers

Sahay Sir > Question Answers > NCERT Exemplar Class 12 > Physics > Chapter 8 - Electromagnetic Waves > Light with an energy flux 20 W/cm^2 falls on a non-reflecting surface at normal incidence. If the surface has an area of 30 cm^2. the total momentum delivered ( for complete absorption) during 30 minutes is

Light with an energy flux 20 W/cm^2 falls on a non-reflecting surface at normal incidence. If the surface has an area of 30 cm^2. the total momentum delivered ( for complete absorption) during 30 minutes is

A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the directions of its electric and magnetic field vectors? If the frequency of the wave is 30 MHz what is its wavelength?