Answer : The correct answer is option (3) [tex]5.68\times 10^{-19}J[/tex]
Explanation: Given,
Wavelength = 350 nm = [tex]350\times 10^{-9}m[/tex] [tex](1nm=10^{-9}m)[/tex]
Now we have to determine the energy of photon.
Formula used:
[tex]E=\frac{hc}{\lambda}[/tex]
where,
E = energy of photon
h = Planck's constant = [tex]6.63\times 10^{-34}J.s[/tex]
c = speed of light = [tex]3\times 10^{8}m/s[/tex]
[tex]\lambda[/tex] = wavelength of photon
Now putting all the given values in this formula, we get:
[tex]E=\frac{(6.63\times 10^{-34}J.s)\times (3\times 10^{8}m/s)}{350\times 10^{-9}m}[/tex]
[tex]E=5.68\times 10^{-19}J[/tex]
Therefore, the energy of photon is, [tex]5.68\times 10^{-19}J[/tex]
