National Aeronautics and Space Administration
Goddard Space Flight Center
Imagine the Universe!
Home
Science
Astronomer's Toolbox
Cosmic Objects
Big Questions
Featured Science
Observatories
Special Exhibits
Scientist Profiles
You Be the Astrophysicist
The Cosmic Distance Scale
Educators' Corner
Lesson Plans
Materials
Programs
Ask an Astrophysicist
Resources
Other Resources
Dictionary
Search
Astronomer's Toolbox
X-ray Detectors: Quiz
X-ray Detectors Quiz
Which of the following is a useful measurement?
[A] time that the X-ray was detected
[B] position that the X-ray photon came from
[C] energy of an incident X-ray photon
[D] all of the above
Most X-ray detectors work by:
[A] slowing down X-rays until they can be collected
[B] building up an image of X-rays from the incident X-ray light
[C] absorbing X-rays and producing a signal proportional to their energy
[D] all of the above
The most accurate measurement of an individual X-ray's energy would probably be using:
[A] a proportional counter
[B] a calorimeter
[C] a CCD
[D] microchannel plates
If you were a working X-ray detector in orbit, what would you see?
[A] lots of X-rays from all angles.
[B] only X-rays that are reflected by the telescope mirrors.
[C] any X-rays from the source straight ahead.
[D] all photons from the source, and you would mark some as X-ray and others as optical.
