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10 Question-Answer on X-rays 1.        If the X-ray tube is working at 20 kV then the minimum wavelength of X-rays will be: (a)     0.31 A (b)    0.62 A (c)     0.93 A (d)    0.47 A Ans: (b) 2.        The maximum distance between interatomic lattice planes is 15 A. the maximum wavelength of X-rays which are diffracted by this crystal will be (a)     15 A (b)    20 A (c)     30 A (d)    45 A Ans: ( c) 3.        For which of the following voltages will the wavelength of emitted X-rays will be minimum? (a)     10 kV (b)    20 k V (c)     30 k V (d)    40 kV Ans: ( d) 4.        The wavelength of characteristic X-rays depends upon (a)     Temperature of target (b)  ...