Consider if the threshold wavelength for Na is 8 × 10–7m, in such case which of the following statement is correct for the emission of photoelectron if λ is the wavelength of light?
1
λ > 8 × 10–7 metre
2
λ < 8 × 10–7 metre
3
λ = 4 × 1014 metre
4
Frequency ≤ 4 × 1014 hertz