Which pair of properties apply to both sound and electromagnetic waves? a) both waves carry energy and refract. b) both waves are longitudinal and carry energy. c) both waves are transverse and matter from one place to another. d) both waves carry energy and do not need a medium to travel through.

To create electromagnetic induction, which of the following has to move? a. a wire b. a magnet c. a transformer d. either a or b

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

Why don't you see your reflection in water with waves or repples