Physics Unit27: Early Quantum Theory and Models of the Atom (id: 7dcca41d8)

本题目来源于试卷: Physics Unit27: Early Quantum Theory and Models of the Atom，类别为 国际高中通用物理

[单选题]
At what rate are photons emitt( z.t.5yrn3 ay ;rwfqdljz7,wed by a 50-W sodium vapor o +p8twf0ws t7lamp? (Assume that the lamp's light is monochromatic an 8w+7 0woftpstd of wavelength $589 \; nm$.)

A. $1.0 \times 10^{20}/$s
B. $1.5 \times 10^{20}/$s
C. $2.0 \times 10^{20}/$s
D. $2.5 \times 10^{20}/$s


参考答案:  B


本题详细解析: 暂无

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