Một cách tử nhiễu xạ có chu kỳ cách tử là d = 6 μm, độ rộng của mỗi khe hẹp là a = 2 μm. Chiếu chùm sáng đơn sắc hẹp có bước sóng λ = 0,6 μm,

vuông góc với bề mặt cách tử. Số cực đại có thể quan sát được trên màn là

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

Immediately upon reaching its lowest point, a falling pendulum bob has its greatest amount of energy, which is the initial amount of potential energy. a. heat; less than b. heat; more than c. kinetic; less than d. kinetic; more than

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form