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Chapter 38: Q6P (page 1181)


What is the photon energy for yellow light from a highway sodium lamp at a wavelength of 589 nm?

Short Answer

Expert verified

The photon energy of the light is 2.1 eV.

Step by step solution

01

Describe the expression of energy of the photon

The energy of a photon of wavelength λis given by,

E=hcλ……. (1)

Here, h is Planck’s constant, and c is the speed of light.

02

Determine the photon energy for yellow light from a highway sodium lamp

Substitute the below values in eq 1.

λ=589nmh=6.626×10-34J.sc=3×108m/s

Therefore, the photon energy of the light is 2.1 eV.

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