問題詳情
47. Which of the following values is closest to the number of photons per secondemitted by a 3.2 mW helium-neon laser with a wavelength of 632 nm?(h=6.63 x10-34 J·S； C=3.0x108m/s)
(A)1.0 x 1016
(B)6.0 x 1015
(C)2.0 x 1015
(D)5.0X1014
(E)3.0 X 1013
參考答案
答案：A
難度：計算中-1
書單：沒有書單，新增