question_answer

X-rays are produced in an X-ray tube operating at a given accelerating voltage. The wavelength of the continuous X-rays has values from

A) \[0\text{ to }\infty \]                   

B) \[{{\lambda }_{\min }}\text{ to }\infty \text{ where }{{\lambda }_{\max }}M\infty \]

C) \[0\text{ to }{{\lambda }_{\max }}\text{ where }{{\lambda }_{\max }}<\infty \]

D) \[{{\lambda }_{\min }}\text{ to }{{\lambda }_{\max }}\text{ where 0}{{\lambda }_{\min }}<{{\lambda }_{\max }}<\infty \]

Correct Answer: B

Solution :

[b] The continuous X-ray spectrum is shown in figure.          All wavelengths \[>{{\lambda }_{\min }}\] are found, \[{{\lambda }_{\min }}=\frac{12400}{V\left( \text{in volts} \right)}\overset{\text{o}}{\mathop{\text{A}}}\,\] Where (in volts) Here V is the applied voltage. c