When a certain metal was irradiated with light of frequency 4×1016 s−1. The photoelectrons emitted had three times the kinetic energy as the kinetic energy of photoelectron emitted when the metal was irradiated with light of frequency2×1016 s−1. If the critical frequency of the metal (νo)=x×1016 s−1, then find the value of x. (given, h=6.6×10−34 Js) .

When a certain metal was irradiated with light of frequency 4×1016 s�

1.	When a certain metal was irradiated with light of frequency 4×1016 s−1. The photoelectrons emitted had three times the kinetic energy as the kinetic energy of photoelectron emitted when the metal was irradiated with light of frequency2×1016 s−1. If the critical frequency of the metal (νo)=x×1016 s−1, then find the value of x. (given, h=6.6×10−34 Js) .
Answer» When a certain metal was irradiated with light of frequency $4 \times 10^{16} s^{- 1}$ . The photoelectrons emitted had three times the kinetic energy as the kinetic energy of photoelectron emitted when the metal was irradiated with light of frequency $2 \times 10^{16} s^{- 1}$ . If the critical frequency of the metal $(ν_{o}) = x \times 10^{16} s^{- 1}$ , then find the value of x. (given, $h = 6.6 \times 10^{- 34} J s$ ) .