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MrRa [10]
3 years ago
9

What is the energy of a single photon of blue light with a wavelength of 488 nm (488 × 10-9 m)?

Chemistry
2 answers:
strojnjashka [21]3 years ago
5 0

Answer : The energy of a photon is, 4.073\times 10^{-19}J

Explanation :

Formula used :

E=\frac{h\times c}{\lambda}

where,

E = energy = ?

h = Planck's constant = 6.626\times 10^{-34}Js

c = speed of light = 3\times 10^8m/s

\lambda = wavelength = 488\times 10^{-9}m

Now put all the given values in the above formula, we get the energy.

E=\frac{(6.626\times 10^{-34}Js)\times (3\times 10^8m/s)}{488\times 10^{-9}m}

E=4.073\times 10^{-19}J

Therefore, the energy of a photon is, 4.073\times 10^{-19}J

Vinvika [58]3 years ago
3 0
E = hf

c = speed of electromagnetic wave, c ≈ 3 * 10⁸ m/s, 
Planck's constant h = 6.63 *10⁻³⁴ Js

h = Planck's constnat,  Frquency, f = c/λ = (3*10⁸)/(488*10⁻⁹)

E = hf

E = hc/λ

E = (6.63 * 10⁻³⁴ * 3 * 10⁸) /(488 * 10⁻⁹)

Energy, E ≈ 4.0758 * 10⁻¹⁹  Joules.
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