In which situation should height be found and which situation should magnification be found in lens and mirror questions

At what time will the interfering waves have an amplitudeof zero?

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up

The release of energy by the nucleus of atom as a result of nuclear fission is radiant energy true false