A 5.0 UV laser emits light that has a wavelength 350 nm.If 1.23 * 10¹⁸ photons are emitted in a pulse,what is the duration of the pulse? A)140 ns B)89 ns C)54 ns D)110 ns E)10 ns

Question

Quizplus · Accepted Answer

The energy of a single photon is calculated using E = hc/λ, where h is Planck's constant and c is the speed of light. For 1.23 * 10^18 photons, the total energy is E_total = 1.23 * 10^18 * hc/λ. Given the power of the laser is 5.0 W, the duration of the pulse is calculated by dividing the total energy by the power, resulting in approximately 140 ns.

A 50 UV Laser Emits Light That Has a Wavelength 350