Two identical photocathodes receive light of frequency `f_(1) andf_(2)` if the velocites of the photo electrons (of mass `m`) coming out are repectively `v_(1) and v_(2)` then

Two identical photocathodes receive light of frequencies v_(1) and v_(2) . If the velocities of the photoelectrons (of mass m) coming out are respectively v_(1) and v_(2) . then

Two identical photocathodes receive light of frequencies f_1 and f_2 . If the velocities of the photo electrons (of mass m ) coming out are respectively v_1 and v_2 then

Two identical photocathode receive light of frequencies f_(1) and f_(2) . If the maximum velocities of the photoelectrons (of mass m) coming out are respectively v_(1) and v_(2) then:

Two identical photo-cathodes receive light of frequencies v and v/2. If the velocities of the photo electrons (of mass m ) coming out are respectively V_1 and V_2 then

Two identical photo-cathodes receive light of frequencies v_1 and v_2 . If the velocities of the photoelectrons (of mass m) coming out are v_1 and v_2 respectively, then

Two identical photocathodes receive the light of frequencies f_(1) and f_(2) respectively. If the velocities of the photo-electrons coming out are v_(1) and v_(2) respectively, then

Light of frequency f_1 and f_2 fall on same metal and the max speed of photo electron is v_1 and v_2 resp. and mass is m. Find relation between v_1 and v_2 .

The threshold frequency for a certain metal is v_(0) when light of frequency v = 2v_(0) is incident on it . The maximum velocity of photoelectrons is 4 xx 10^(6) m/s . If the frequency of incident radiation is increase to 5 v_(0) , the maximum velocity of photo electrons in m/s will be .

Photoelectric emission is observed from a metallic surface for frequencies v_(1) and v_(2) of the incident light rays (v_(1) gt v_(2)) . If the maximum values of kinetic energy of the photoelectrons emitted in the two cases are in the ratio of 1 : k , then the threshold frequency of the metallic surface is