Final answer:
To calculate the number of photons emitted per second by the heat lamp, use the formula Number of photons = Power / Energy per photon.
Step-by-step explanation:
The number of photons emitted per second can be calculated using the formula:
Number of photons = Power / Energy per photon
To find the energy per photon, we can use the formula:
Energy per photon = Planck's constant x speed of light / wavelength
By substituting the given values into the formulas, we can calculate the number of photons emitted per second.