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. The value of A and H will be ............ and .................. respectively.

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. The value of A and H will be ............ and .................. respectively.
Answer» `6329Å,6.14xx10^(12)` `6329Å,4.5xx10^(24)` `4.5xx10^(15),1401Å` `1401Å,6.14xx10^(12)` Solution :For A `C=v lamda, lamda =C/v` `lamda=(3xx10^(8)ms^(-1))/(4.74xx10^(14)s^(-1))=6329xx10^(-10)M` `lamda=6329Å=A` For (H)`E=hv , v=E/h` `v=(3xx10^(-9)J)/(6.63xx10^(-34)JS)=4.5xx10^(24)`