For what wavelength does a 100 mW laser deliver 1.6 × 10¹⁷ photons in one second?

Question

Quizplus · Accepted Answer

The energy of a photon is given by E = hc/λ. The total energy delivered by the laser in one second is 100 mW = 0.1 J. Using the formula E = nhc/λ, where n is the number of photons, we can solve for λ: λ = nhc/E. Substituting n = 1.6 × 10^17, h = 6.626 × 10^-34 J·s, c = 3 × 10^8 m/s, and E = 0.1 J, we find λ ≈ 320 nm.

For What Wavelength Does a 100 MW Laser Deliver 1