A homogeneous ball (mass = m) of ideally black material at rest is illuminated with a radiation having photons (wavelength = λ ) each with the same momentum and same energy. Photons fall on the ball a

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A homogeneous ball (mass = m) of ideally black material at rest is illuminated with a radiation having photons (wavelength = λ ) each with the same momentum and same energy. Photons fall on the ball at the rate n (per second). The linear acceleration of the ball is

TestHub · Accepted Answer

Each absorbed photon transfers momentum h / λ ; force F = λ nh ​ (rate of momentum), so a = m F ​ = mλ nh ​ .

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