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Explain the relationship between the energy of a photon in joules or electron volts and its wavelength or frequency. Calculate the number of photons per second emitted by a monochromatic source of specific wavelength and power.
Photon energy is the energy carried by a single photon. The amount of energy is directly proportional to the photon's electromagnetic frequency and thus, equivalently, is inversely proportional to the wavelength. The higher the photon's frequency, the higher its energy.
The energy associated with a single photon is given by E = hν , where E is the energy (SI units of J), h is Planck's constant (h = 6.626 x 10 –34 J s), and ν ν is the frequency of the radiation (SI units of s –1 or Hertz, Hz) (see figure below). Frequency is related to wavelength by λ = c/ν λ = c / ν , where c, the speed of light, is ...
The relationship between energy (E), frequency and wavelength can be described with this equation: E=hf=\frac {hc} {\lambda} E = hf = λhc. The energy is simply the photon’s frequency multiplied by the Planck constant (h). Frequency and wavelength are inverse correlated by way of the speed of light (c): f=\frac {c} {\lambda}\\ [0.1in] c=f ...
Explain the relationship between the energy of a photon in joules or electron volts and its wavelength or frequency. Calculate the number of photons per second emitted by a monochromatic source of specific wavelength and power.