When light bulbs are connected in parallel and you unscrew one light bulb, the other light bulbs will a. All go out
b. All get dimmer
c. All get brighter
d. All stay on

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