Physics - Electromagnetic Radiation
OCR A-Level Physics 2022
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Flashcards
Photon energy
What is the equation for the energy of a photon in terms of frequency?
\[E = hf\]
What is the equation for the energy of a photon in terms of wavelength?
\[E = \frac{hc}{\lambda}\]
What is the approximate value of $h$, Plank’s constant?
\[6.63 \times 10^{-34}\]
What unit is commonly used for the energy on a photon?
Electronvolts, $eV$s.
Photodiodes
Why might the efficiency of a photodiode be less than 100%?
- Some photons are not absorbed
- Some photons are reflected