Answer:
[tex]\lambda = 260.9nm[/tex]
Explanation:
As we know that work function is defined as the minimum energy of photons required to produce the photo electric effect
so here we have
[tex]\phi = \frac{hc}[\lambda}[/tex]
now we know that
[tex]h = 6.63\times 10^{-34}[/tex]
[tex]c = 3\times 10^8 m/s[/tex]
[tex]\lambda[/tex] = wavelength of photons
now from above formula
[tex]7.59 \times 10^{-19} = \frac{(6.36 \times 10^{-34})(3\times 10^8)}{\lambda}[/tex]
[tex]\lambda = \frac{(6.36 \times 10^{-34})(3\times 10^8)}{7.59 \times 10^{-19}}[/tex]
[tex]\lambda = 260.9nm[/tex]
