When a certain metal was irradiated with light of frequency 4.0 × 1016 s−1, the photoelectrons emitted had three times the kinetic energy as the kinetic energy of photoelectrons emitted when the metal was irradicated with light of frequency 2.0 × 1016s−1. Calculate the critical frequency (ν0) of the metal.

When a certain metal was irradiated with light of frequency 4.0 × 101

1.	When a certain metal was irradiated with light of frequency 4.0 × 1016 s−1, the photoelectrons emitted had three times the kinetic energy as the kinetic energy of photoelectrons emitted when the metal was irradicated with light of frequency 2.0 × 1016s−1. Calculate the critical frequency (ν0) of the metal.
Answer» When a certain metal was irradiated with light of frequency $4.0 \times 10^{16} s^{- 1}$ , the photoelectrons emitted had three times the kinetic energy as the kinetic energy of photoelectrons emitted when the metal was irradicated with light of frequency $2.0 \times 10^{16} s^{- 1}$ . Calculate the critical frequency ( $ν_{0}$ ) of the metal.