1.

Transitions between three energy levels in a particular atom give rise to three spectral lines of wavelengths, in increasing magnitudes, lambda_(1) , lambda_(2) and lambda_(3), which one of the following equations correctly relates lambda_(1), lambda_(2) and lambda_(3)?

Answer»

`lambda_(1) = lambda_(2) - lambda_(3)`
`lambda_(1) = lambda_(3) - lambda_(2)`
`(1)/(lambda_(1) ) = (1)/(lambda_(2)) + (1)/(lambda_(3))`
`(1)/(lambda_(1)) = (1)/(lambda_(3)) + (1)/(lambda_(2))`

ANSWER :C


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