Mastering Physics: Bremsstrahlung Radiation Conceptual Question

 The graph below displays the spectrum of X rays emitted when electrons are accelerated through a potential difference of 35,000 and collided with a molybdenum target. The shortest wavelength X rays produced by this process are of about 0.035 .

Part A
If the accelerating voltage is decreased from 35,000 to 30,000 , determine what will happen to the wavelength of the shortest wavelength X rays produced.

ANSWER:

The wavelength will decrease to less than 0.035 . The wavelength will stay the same at 0.035 . The wavelength will increase to greater than 0.035 .

 Now return the accelerating voltage to 35,000 .

Part B
Molybdenum has an atomic number of 42. If a larger atomic number element is used as a target, determine what will happen to the wavelength of the shortest wavelength X rays produced.

ANSWER:

The wavelength will decrease to less than 0.035 . The wavelength will stay the same at 0.035 . The wavelength will increase to greater than 0.035 .

Part C
If a larger atomic number element is used as a target, determine what will happen to the wavelength of the line.

 ANSWER:

It will decrease to a smaller wavelength. It will stay the same at about 0.074 . It will increase to a greater wavelength.