1.

A laser ( light amplification of stimulated emission of radiation ) provides a coherent( in phase ) nearly monochromatic source of high intensty light. Lasers are used in eye surgery, CD // DVD players basic research, etc. some modern eye lasers can be "tuned" to emit a desired wavelength. The following table shows the lambda( nm ) , v( s^(-1))andE ( J) but some of the data is missing : The value of A and H will be "........................." and "............................." respectively.

Answer»

`6329 Å , 6.14 xx 10^(12)`
`6329Å , 4.5 xx 10^(24)`
`4.5 xx 10^(15),1401Å`
`1401Å,6.14 xx 10^(12)`

Answer :B


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