Module 2: Electro-
Optics
1. In comparison to the radio spectrum, the
True
elec- tro-optic spectrum consists of
higher frequen- cies and shorter
wavelengths
d. micrometer or "microns"
2. What unit of measure is most commonly
used to describe the Electro-Optical
Spectrum:
a. GHz
b. MHz
c. Kelvin
d. micrometer or "microns" c. Precision imaging (ID
possible)
3. Select advantages Electro Optics e. covert (passive)
have over RADAR:
a. Overt (active)
b. Shorter ranges
c. Precision imaging (ID possible)
d. Longer ranges
e. Covert (passive)
4. Blackbody radiator Substance that absorbs all
incident energy and emits all
absorbed ener- gy
5. Radiant Power Energy per time propagating
from a radiating source (W)
6. Radiant Exitance Power per unit area emitted from
the surface of a radiator
(W/m^2)
1/
18
, Module 2: Electro-
Optics
7. Irradiance
2/
18
, Module 2: Electro-
Optics
Power per unit area incident
to the surface of an optic
aperture (W/m^2)
8. converts ideal exitance into d. Emissivity
actual material exitance by accounting
for differences in blackbody vs graybody
properties.
a. Wavelength
b. Absorptivity
c. Temperature
d. Emissivity
emissivity + reflectivity = 1
9. Given the three assumptions we use in
this
course (see below), select all statements that are reflectivity > 0
true about Graybodies: transmit- tance of
an IR wave with a
-Constant temperature wavelength of 8.7
-Opaque object, τ = 0 microns that
-For graybodies, α ρ ε are NOT a function travels from a
of wavelength (constant) target 21 meters
away through the
absorptivity = 1
atmosphere to
emissivity + reflectivity = 1
your EO/IR
transmissivity > 0
reflectivity > 0
absorptivity =
emissivity emissivity
=1
10. Using Beer-Lambert Law, what is the
3/
18
Optics
1. In comparison to the radio spectrum, the
True
elec- tro-optic spectrum consists of
higher frequen- cies and shorter
wavelengths
d. micrometer or "microns"
2. What unit of measure is most commonly
used to describe the Electro-Optical
Spectrum:
a. GHz
b. MHz
c. Kelvin
d. micrometer or "microns" c. Precision imaging (ID
possible)
3. Select advantages Electro Optics e. covert (passive)
have over RADAR:
a. Overt (active)
b. Shorter ranges
c. Precision imaging (ID possible)
d. Longer ranges
e. Covert (passive)
4. Blackbody radiator Substance that absorbs all
incident energy and emits all
absorbed ener- gy
5. Radiant Power Energy per time propagating
from a radiating source (W)
6. Radiant Exitance Power per unit area emitted from
the surface of a radiator
(W/m^2)
1/
18
, Module 2: Electro-
Optics
7. Irradiance
2/
18
, Module 2: Electro-
Optics
Power per unit area incident
to the surface of an optic
aperture (W/m^2)
8. converts ideal exitance into d. Emissivity
actual material exitance by accounting
for differences in blackbody vs graybody
properties.
a. Wavelength
b. Absorptivity
c. Temperature
d. Emissivity
emissivity + reflectivity = 1
9. Given the three assumptions we use in
this
course (see below), select all statements that are reflectivity > 0
true about Graybodies: transmit- tance of
an IR wave with a
-Constant temperature wavelength of 8.7
-Opaque object, τ = 0 microns that
-For graybodies, α ρ ε are NOT a function travels from a
of wavelength (constant) target 21 meters
away through the
absorptivity = 1
atmosphere to
emissivity + reflectivity = 1
your EO/IR
transmissivity > 0
reflectivity > 0
absorptivity =
emissivity emissivity
=1
10. Using Beer-Lambert Law, what is the
3/
18
