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A laser (light amplification by stimulat...

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

`6329Å,6.14xx10^(12)`

B

`6329Å,4.5xx10^(24)`

C

`4.5xx10^(15),1401Å`

D

`1401Å,6.14xx10^(12)`

Text Solution

Verified by Experts

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)`
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