Determine the wavelength of radiation, the quantum energy of which is 1.2 * 10 ^ -19 J.

univerkov | September 5, 2021 | education

Initial data: E (energy of quanta of the considered wave) = 1.2 * 10 ^ -19 J.

Constant data: h (Planck’s constant) = 6.62 * 10 ^ -34 J * s; C (speed of light) = 3 * 10 ^ 8 m / s.

We define the radiation wavelength from the formula: E = h * C / λ, whence λ = h * C / E.

Let’s make the calculation: λ = 6.62 * 10 ^ -34 * 3 * 10 ^ 8 / (1.2 * 10 ^ -19) = 1.655 * 10 ^ -6 m (1.655 microns).

Answer: The radiation wavelength is 1.655 microns.

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