A helium-neon laser emits red light having a wavelength of 632.8 nm and a power of 0.50 mW.How many photons are emitted each second? (h = 6.63 x 10^-34 J*s,c = 3.00 x 10⁸m/s,and 1 nm = 10^-9m) A)1.6 x 10¹⁵ B)3.3 x 10¹⁶ C)4.8 x 10¹⁷ D)2.6 x 10¹⁸

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Quizplus · Accepted Answer

The energy of a single photon is given by E = hc/λ, where h is Planck's constant, c is the speed of light, and λ is the wavelength. The power of the laser is given by P = N E, where N is the number of photons emitted per second. Substituting the given values, we get:P = N E0.50 mW = N (6.63 x 10^-34 J s) (3.00 x 10^8 m/s) / (632.8 x 10^-9 m)N = 1.6 x 10^15 photons/s

A Helium-Neon Laser Emits Red Light Having a Wavelength of 632.8