1.

The momentum of a photon in an X-ray beam of \[{{10}^{-10}}\]metre wavelength is                                    [MP PET 1996]

A.            \[1.5\times {{10}^{-23}}kg-\]m/sec                                
B.            \[6.6\times {{10}^{-24}}kg-m/\sec \] m/sec
C.            \[6.6\times {{10}^{-44}}kg-m/\sec \]m/sec                
D.            \[2.2\times {{10}^{-52}}kg-m/\sec \] m/sec
Answer» C.            \[6.6\times {{10}^{-44}}kg-m/\sec \]m/sec                


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