Choose the correct relationship, when E=energy, h=plank's constant, c=velocity of light, ν =frequency, λ =wave length:
Correct answer: C. E = hv
- A. E = hvc
- B. E = c/λ
- C. E = hv
- D. E =nλ/c
Explanation
The energy associated with a single photon is given by E = h ν , where E is the energy (SI units of J), h is Planck's constant (h = 6.626 x 10-34 J s), and ν is the frequency of the radiation (SI units of s-1 or Hertz, Hz)
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About Photons and the Particle Model of Light
The particle model treats light as photons with energy E equals hf and momentum related to wavelength. Questions involve the photoelectric effect, work function, threshold frequency, stopping potential and photon energy, while distinguishing particle behaviour from the wave description of interference and diffraction.
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