Photo electric emission is observed from a metallic surface for frequencies v_(1) and v_(2) of the incident light rays (v_(1)gtv_(2)). If the maximum values of kinetic energy of the photo elections emitted in the two cases are in the ratio of 1:K, then the threshold frequency f the metallic surface is

Photo electric emission is observed from a metallic surface for freque

1.	Photo electric emission is observed from a metallic surface for frequencies v_(1) and v_(2) of the incident light rays (v_(1)gtv_(2)). If the maximum values of kinetic energy of the photo elections emitted in the two cases are in the ratio of 1:K, then the threshold frequency f the metallic surface is
Answer» `(v_(2)-v_(1))/(K-1)` `(Kv_(1)-v_(2))/(K-1)` `(Kv_(2)-v_(1))/(K-1)` `(v_(2)-v_(1))/(K)` ANSWER :B

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