In 1.0 s,a 60 W bulb emits 11 J of energy in the form of infrared radiation (heat)of wavelength 1850 nm.How many photons of infrared radiation does the lamp generate in 1.0 s?

Question

Quizplus · Accepted Answer

The energy of one photon is calculated using E = hc/λ. Using Planck's constant (h = 6.626 x 10^-34 J·s), speed of light (c = 3 x 10^8 m/s), and wavelength (λ = 1850 nm = 1850 x 10^-9 m), we find the energy per photon. Then, divide the total energy emitted (11 J) by the energy per photon to find the number of photons.

In 10 S,a 60 W Bulb Emits 11 J of Energy