Final answer:
In quantum mechanics, energy is emitted or absorbed in discrete packets called photons, which have quantized energy. The energy of a photon is directly proportional to its frequency, and this relationship can be expressed using the equation E = hf. To determine the number of photons per second emitted by a source, you need to know the power of the source and the energy of each photon.
Step-by-step explanation:
In quantum mechanics, the concept of quantized energy refers to the idea that energy is only emitted or absorbed in discrete packets known as photons. The energy of a photon is directly proportional to its frequency. The relationship between the energy of a photon and its wavelength or frequency can be expressed using the equation E = hf, where E is the energy, h is Planck's constant, and f is the frequency.
To determine the number of photons per second emitted by a source, you need to know the power of the source in watts and the energy of each photon. The power is given in joules per second, which allows you to find the energy emitted in joules. By comparing this to the energy associated with each photon using the equation E = hf, you can calculate the number of photons emitted per second.
Let's say you have a monochromatic source with a specific wavelength and power. You can calculate the energy emitted per second by multiplying the power in watts by the time in seconds. Then, using the equation E = hf, you can calculate the energy associated with each photon. Finally, by dividing the energy emitted per second by the energy associated with each photon, you can determine the number of photons emitted per second.