A continuous-wave laser emits of light at

PHYSICS · Single correct · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter

Problem

A continuous-wave laser emits

15.0\,\text{mW}

of light at

450\,\text{nm}

. If a solution placed in the beam absorbs

35\%

of the incident photons over a period of

2.0\,\text{min}

, approximately how many photons are absorbed? (a)

2.6\times10^{18}

(b)

1.4\times10^{18}

(c)

1.4\times10^{17}

(d)

4.2\times10^{18}