To calculate the number of photons emitted per minute by a laser, we need to use the equation:
Number of photons = (Power in watts / Energy per photon) * 60
First, let's calculate the energy per photon using the wavelength provided. The energy of a photon can be calculated using the equation:
Energy per photon = (Planck's constant * Speed of light) / wavelength
Planck's constant (h) = 6.62607015 × 10^(-34) J·s Speed of light (c) = 299,792,458 m/s Wavelength (λ) = 632.8 nm = 632.8 × 10^(-9) m
Now we can substitute the values into the equation to calculate the energy per photon:
Energy per photon = (6.62607015 × 10^(-34) J·s * 299,792,458 m/s) / (632.8 × 10^(-9) m)
Calculating this expression gives us the energy per photon. Let's call it E.
Next, we can calculate the number of photons emitted per minute using the given power output of the laser:
Number of photons = (3.2 × 10^(-3) W / E) * 60
Substituting the calculated value of E into the equation, we can find the number of photons emitted per minute.