The momentum of the photon of wavelength $5000 A^{o}$ will be :

1.3 \times 10^{- 27} k g - m / s

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1.3 \times 10^{- 28} k g - m / s

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4 \times 10^{29} k g - m / s

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4 \times 10^{- 18} k g - m / s

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Solution

The correct option is A $1.3 \times 10^{- 27} k g - m / s$
AS we know,
$p = \frac{h}{λ} = \frac{6.6 \times 10^{- 34}}{(5000 \times 10^{- 10}} = 1.3 \times 10^{- 27} k g - m / s$

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