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This question has Statement - 1 and Statement - 2. Of the four choices given after the statements, choose the one that best describes the two statements. Statement-1 : A metallic surface is irradiated by a monochromatic light of frequency vgtv_(0) (the threshold frequency). The maximum kinetic energy and the stopping potential are K_(max) and V_(0) respectively. If the frequency incident on the surface doubled, both the K_(max) and V_(0) are also doubled. Statement-2 : The maximum kinetic energy and the stopping potential of photoelectrons emitted from a surface are linearly dependent on the frequency of incident light. |
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Answer» Statement-1 is true, Statement-2 is true, Statement 2 is the correct explanation of Statement-1. `h_(v)-hv_(0)=exx DeltaV` `V_(0)=(hv)/(e)-(hv_(0))/(e)` .V. is doubled `(KE_("max"))_(2)=hv-hv_(0)` `V_(0).=(DeltaV).=(2hv)/(e)-(hv_(0))/(e)` `((K_("max"))_(1))/((KE_("max"))_(2))` = may not be EQUAL to 2. `rArr (V_(0))/(V_(0))` my not equal to2. `KE_("max")=hv-hv_(0)` `V=(hv)/(e)-(hv_(0))/(e)` so K.E. and v depend upon v only. |
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