question_answer

An electron beam in an X-ray tube is accelerated through a potential difference of 50000 volts. These are then made to fall on a tungsten target. The shortest wavelength of the X-ray emitted by the tube is                                              [MP PET 1997]

A)            2.5 Å                                        

B)            0.25 nm

C)            0.25 cm                                   

D)            0.025 nm