1.

If lambda_(0) is the threshold wavelnegth of a metal and lambda is the wavelength of the incident radiation, the maximum velocity of the ejected electron from the metal would be

Answer»

`[ ( 2hc)/( m )((lambda_(0) - LAMBDA)/( lambda_(0) lambda))]^(1//2)`
`[ ( 2hc)/( m )((lambda-lambda_(0) )/( lambdalambda_(0)))]^(1//2`
`[ ( 2hc)/( m ) ( lambda - lambda_(0) ) ]^(1//2)`
`[ ( 2hc)/( m ) ( lambda_(0) - lambda) ]^(1//2)`

ANSWER :A


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