2021 WAEC Physics Theory Explain the wave-particle duality of light. (b) A particle of wavelength 4.2x 10\(^{-11}\)m travels (a) With...

Explain the wave-particle duality of light. (b) A particle of wavelength 4.2x 10\(^{-11}\)m travels (a) With a momentum of 1.6 x 10\(^{-23}\) kg m/s,

Determine the value of the Planck's constant, h.

(a) Explanation of wave-particle duality of light: Light can act as a particle (by way of Photon) and also simultaneously).

(b) Determination of Planck's Constant

h = π P = 4.2 x 10\(^{-11}\) x 1.6 x 10\(^{-23}\) as waves

= 6.72 x 10\(^{-34}\) JS

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