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☆☆☆☆☆Cards in this guide (3)
What equation is used to calculate the energy of a photon
Energy = hc/λ
h = Planck's constant (6.626 × 10-34 m2 kg/s)
c = the speed of light (3.00 × 108 m/s)
λ = the wavelength
Example question: What is the energy of a photon with a wavelength of 700 nm?
Convert the wavelength to meters (1 nm = 10-9 m)
700 nm = 700 × 10-9 m
Energy = (6.626 × 10-34)(3.00 × 108) ÷ (700 × 10-9) = 2.84 × 10-19 J
How do you refer to a wave
By it's frequency
What is the frequency of a wave with a velocity of 100ms and a wavelength of 20m
5hz
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