All RF Cafe Quizzes make great fodder for
employment interviews for technicians or engineers - particularly those who are
fresh out of school or are relatively new to the work world. Come to think of it,
they would make equally excellent study material for the same persons who are going
to be interviewed for a job. Bonne chance, Viel Glück, がんばろう,
buena suerte, удачи, in bocca al lupo, 행운을 빕니다,
ádh mór, בהצלחה, lykke til, 祝你好運.
Well, you know what I mean: Good luck!
Click here for the complete list of
RF Cafe Quizzes.
Note: Some material based on books have
This quiz is based on the information presented
in "Introduction to Infrared and Electro-Optical Systems," by Ronald
G. Driggers and Melvin H. Friedman.
Graciously provided by
1. What is the term for light distribution on the image
plane from a point source?
a) Point spread function
b) Light distribution function
Specular distribution function
d) Snell's Law
2. What is the term for when there is a fixed phase relationship
of an EM field between two points in space or two points in time?
3. What is the term describing "any deviation of light
rays from rectilinear paths which cannot be interpreted as reflection or refraction?"
4. Which material listed below has the highest total emissivity
(defined as total spectral signature wrt a blackbody)?
a) Snow & graphite
b) Paper & brick
gold & polished brass
d) Oxidized brass & oxidized steel
Match the lens ray tracing diagram with its application type.
a) Magnifying glass ____
d) Search light ____
6. What is a 'Cold Shield' as used in electro-optical
a) A military acronym for special night combat exercises
cooled aperture adjacent to the detector plane
c) Super-cooled armor placed
around an infrared system
d) The cold calibration standard used in conjunction
with a "hot" standard
7. What are the two general classes of electro-photonic
a) Electronic and photonic
b) Photon (quantum) and thermal
c) Up and down spin
d) Commercial and military
8. What is a bolometer?
a) A device for generating a broadband noise spectrum
b) A device
for generating a narrowband noise spectrum
c) A device for measuring the
inverse resistance of light
d) A device which varies its electrical resistance
depending on the total electromagnetic power incident upon it.
9. What is the modern name of the U.S. Army's former Night
Vision Laboratory (NVL)?
a) Post-Day Vision Laboratory (PDVL)
b) Night Vision & Electronic
Sensors Directorate (NVESD)
Robert C. Byrd Night Vision Laboratory (RCBNVL)
Vision Laboratory (NVL)
10. What is Persistent Surveillance?
a) The use of wide-area coverage airborne sensors
c) Unyielding surveillance
d) Narrowly focused surveillance
Need some help? Click here for
the answers and explanations.
Posted April 16, 2021