Chapter 11, Problem 11.14P

Interpretation Introduction

Interpretation:

Time taken for the excitation of ${10}^6$ protons has to be determined where a single molecule can be excited by $1.0mW$ radiation having wavelength , $488nm$ .

Concept Introduction:

Time taken for the emission of one photon can be given as,

  $Timetakenfortheemissionofonephoton\text{ = }\frac{Energy\text{ of a photon}}{Output\text{ power}}$

Planck’s equation,

  $\begin{array}{c}\text{E}\text{=}\text{hν}\text{=}\frac{\text{hc}}{\text{λ}}\\ \text{where, ν}=\text{frequency}\\ \text{λ}=\text{wavelength}\end{array}$