What is the energy of a single photon of blue light with a wavelength of 488 nm?

3.24 x 10-31 j

3.24 x 10-40 j

4.08 x 10-28 j

4.08 x 10-19 j

We know, Frequency = speed of light / wavelength
f = 3 * 10^8 / 4.88 * 10-7
f = 6.1 * 10^14

Now, Energy = Planck's constant * frequency
E = 6.62607004 × 10-34 * 6.1 * 10^14
E = 4.08 * 10^-19 J

In short, Your Answer would be Option D

Hope this helps!