# What is the mass of a photon of red radiation, the wavelength is 0.75 * 10 ^ -6 m.

September 27, 2021 | education

| To determine the value of the mass of a photon of red radiation, it is necessary to use the formula: m = h / (Vc * λ).

Constants and variables: h – Planck’s constant (h = 6.62607 * 10 ^ -34 J * s); Vc is the speed of light (Vc ≈ 3 * 10 ^ 8 m / s); λ – wavelength (λ = 0.75 * 10 ^ -6 m).

Calculation: m = h / (Vc * λ) = 6.62607 * 10 ^ -34 / (3 * 10 ^ 8 * 0.75 * 10 ^ -6) ≈ 2.95 * 10 ^ -36 kg.

Answer: The mass of a photon of red radiation, according to the calculation, is 2.95 * 10 ^ -36 kg.

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