A laser (light amplification by stimulated emission of radiation) provides a coherent (in phase )nearly monochromatic source of high intensityi light. Lasers are used in eye surger, CD/DVD players basic research etc. some miodern eye lasers can be tuned to emit a desired wavelength. The following table shows the lamda(nm),v(s^(-1)) and E(J) but some of the data is missing. If an electrons absorbs energy equalto D in hydrogen atom in first excited state and after reaching highest excited level it returns to ground level. How many possible lines will be obtained in hydrogen spectrum?

A laser (light amplification by stimulated emission of radiation) prov

1.	A laser (light amplification by stimulated emission of radiation) provides a coherent (in phase )nearly monochromatic source of high intensityi light. Lasers are used in eye surger, CD/DVD players basic research etc. some miodern eye lasers can be tuned to emit a desired wavelength. The following table shows the lamda(nm),v(s^(-1)) and E(J) but some of the data is missing. If an electrons absorbs energy equalto D in hydrogen atom in first excited state and after reaching highest excited level it returns to ground level. How many possible lines will be obtained in hydrogen spectrum?
Answer» 10 6 3 none of these Solution :(D)`=E=(hc)/(LAMDA)` `=(6.63xx10^(-34)xx3xx10^(8))/(4.879xx10^(-7))` (D)`=4.1xx10^(-19)` In EV `4.1xx10^(-19)=2.55eV` The e is already present at first excited level. So, by absorbign this much energy e can move up to FOURTH level and when it returns to ground level total lines will be `(n(n-1))/2=6`