GRE Question of the Week post and replies

Return to the GRE Question of the Week thread
Login to post to this thread

This week's question - Oct 15, 2009 at 5:52PM
Dave Avatar
Dave
San Marcos, Texas
352 Posts

This one is really a definition, but here it is

In the production of X-rays, the term "bremsstrahlung" refers to which of the following:

A) The cut-off wavelength of the X-ray tube.

B) The discrete X-ray lines emitted when an electron in an outer orbit fills a vacancy in an inner orbit of the atoms in the target metal of the X-ray tube.

C) The discrete X-ray lines absorbed when an electron in an inner orbit fills a vacancy in an outer orbit of the atoms in the target metal of the X-ray tube.

D) The smooth, continuous X-ray spectra produced by high-energy blackbody radiation from the X-ray tube.

E) The smooth, continuous X-ray spectra produced by rapidly decelerating electrons in the target metal of the X-ray tube.

Dave


Try not to become a man of success, but rather try to become a man of value -- Albert Einstein

Replies to This week's question

Re: This week's question - Oct 19 2009 12:13AM
JFuchs
4 Posts

I'm going to go with E on this one, if memory serves.



Re: This week's question - Oct 26 2009 2:12PM
Dave Avatar
Dave
San Marcos, Texas
352 Posts

Josh was right.  The correct answer is E.  Bremsstrahlung is translated as "braking radiation" and occurs when accelerated electrons decelerate in a solid, giving off radiation (remember that all accelerating charges radiate energy).

Dave


Try not to become a man of success, but rather try to become a man of value -- Albert Einstein