If a beam of X ray has a wavelength of 1 A , then what is the energy – McqOptions

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1.	If a beam of X ray has a wavelength of 1 A , then what is the energy of this wave?
A.	39.78 x 10<sup>-16</sup>erg
B.	19.89 x 10<sup>-16</sup>erg
C.	39.78 x 10<sup>-16</sup>J
D.	19.89 x 10<sup>-16</sup>J
Answer» E.

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