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

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What is the energy of a single photon of blue light

dchirunga23

09.01.2022

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, $4.073\times 10^{-19}J$

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