1.

The momentum of the photon of wavelength 5000Å  will be [CPMT 1987]

A.            \[1.3\times {{10}^{-27}}kg\text{-}\]m/sec                  
B.            \[1.3\times {{10}^{-28}}kg\text{-}\]m/sec
C.            \[4\times {{10}^{29}}kg\text{-}\]m/sec                       
D.            \[4\times {{10}^{-18}}kg\text{-}\]m/sec
Answer» B.            \[1.3\times {{10}^{-28}}kg\text{-}\]m/sec


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