(0) Ifanew source (its energy is 7.19 x101? J with an intensity of35W is
Incident on the copper Surface, What is the maximum number ofelcetrons
that can be ejected from a 6.0 second pulse oflight ? 【100 台聯大(Al,A5)】
吝 (A) 0 (B) 3.71x 1016 Hz, (0) 3.71x 1017 Hz。(D) 3.71x 1018 Hz,
(E)none ofabove.
Ans.: (A)
