A leaser emits monochromatic radiation of wavelength 663 nm. If it emits 10^(5) quanta per second per square metre, calculate the power output of the laser in joule per square metre per second.

A leaser emits monochromatic radiation of wavelength 663 nm. If it emi

1.	A leaser emits monochromatic radiation of wavelength 663 nm. If it emits 10^(5) quanta per second per square metre, calculate the power output of the laser in joule per square metre per second.
Answer» <html><body><p></p>Solution :<a href="https://interviewquestions.tuteehub.com/tag/energy-15288" style="font-weight:bold;" target="_blank" title="Click to know more about ENERGY">ENERGY</a> of one quantum `= hv = h (c)/(lamda) = ((6.63 xx 10^(-34)Js) (<a href="https://interviewquestions.tuteehub.com/tag/3-301577" style="font-weight:bold;" target="_blank" title="Click to know more about 3">3</a> xx 10^(<a href="https://interviewquestions.tuteehub.com/tag/8-336412" style="font-weight:bold;" target="_blank" title="Click to know more about 8">8</a>) ms^(-1)))/((663 xx 10^(-9)m)) = 3 xx 10^(-19) <a href="https://interviewquestions.tuteehub.com/tag/j-520843" style="font-weight:bold;" target="_blank" title="Click to know more about J">J</a>` <br/> Energy emitted per <a href="https://interviewquestions.tuteehub.com/tag/sec-1197209" style="font-weight:bold;" target="_blank" title="Click to know more about SEC">SEC</a> per square metre = No. of quanta emitted per sq. metre per sec `xx` Energy of one quantum. <br/> `= 10^(15) xx 3 xx 10^(-19) J m^(-2) s^(-1)` <br/> `= 3xx 10^(-4) J m^(-2) s^(-1)`</body></html>