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11.Dual Nature of Radiation and matter
easy
The momentum of a photon in an $X-$ ray beam of ${10^{ - 10}}$ metre wavelength is
A
$1.5 \times {10^{ - 23}}kg - m/sec$
B
$6.6 \times {10^{ - 24}}kg - m/\sec$
C
$6.6 \times {10^{ - 44}}kg - m/\sec $
D
$2.2 \times {10^{ - 52}}kg - m/\sec $
Solution
(b)Momentum of photon
$p = \frac{h}{\lambda } = \frac{{6.6 \times {{10}^{ – 34}}}}{{{{10}^{ – 10}}}}$
=$6.6 × 10^{-24} kg – m/sec.$
Standard 12
Physics
