"Can't Buy me λove"
By adjusting element timing, ESAs shape their radiation pattern through constructive and destructive forms of this wave behavior.
What is interference
What is turbulence
These two pieces of equipment that can be used as a Torpedo countermeasures
What are PRAIRIE, Masker, NIXIE, Acoustic Device Countermeasures (AQD), Degaussing, AN/WLR-9
This is the Energy required to hold two nuclei together (or conversely break two nuclei apart)
What is "Binding Energy?"
This type of launcher uses a brief burst of force from a propellant or compressed gas to accelerate a projectile along a ballistic trajectory.
What is an impulse type launcher
This describes the Doppler effect.
A change in frequency of a wave due to the relative motion of the wave source and the detector.
EO sensors take advantage of these two regions of the EM spectrum
What are Visible Light and IR
These are the three methods of mine detonation
What are contact, command, influence (Magnetic, Acoustic, Pressure, Combination)
The 4 types of radiation released during a nuclear reaction.
What are Alpha, Beta, Gamma, Neutron?
What is deflagration?
This type of radar generates a high resolution "image" of the target
What is a Synthetic Aperture Radar (SAR)
This is one advantage and one disadvantage of EO detectors
Adv: Passive, Precise, Video
Disadv: Susceptible to atm, range limited to LOS
These three things affect sound speed in water.
What are temperature, pressure, and salinity.
These are the three methods of EM wave attenuation
What are spreading, absorption, scattering
These are the three main exterior forces that affect ballistics or projectile motion
What are gravity, drag, and the Coriolis effect
This term is represented by Ae in the Radar Range equation. Describe it.
Radar Aperture; a measure of the functional area available for signal detection
Wien's law describes this
What is the law that gives the resultant peak wavelength of an EO source
These two equations can be used to determine if an active sonar return is detectable.
SL - 2TL + TS - RL > DT
SL - 2TL + TS – NL + DI > DT
Light traveling through air (n1=1) strikes a boundary at an angle of 40∘ measured from the normal (the y-axis).
Upon entering a second medium, it refracts to an angle of 15∘ from the normal.
Calculate (a) the refractive index of the second medium and (b) the speed of light in that medium.
Assume c=v in air.
n1sinθ1=n2sinθ2
n2≈2.48
v≈1.21×108 m/s
This describes an explosive shock wave that bends around the edges of a target, causing a uneven overpressure
What is Diffraction Loading?
One advantage and One disadvantage of a Continuous Wave Radar (CWR)
Adv: simultaneously transmits and receives
Disadv: Cannot measure range due to signal ambiguity
The max wavelength of a 8000K star
What is 362 nm
This picture portrays the 5 main sound propagation paths.
These describe how an EM Wave is generated
What are Maxwell's Equations (Time Varying Electric Field -> Time Varying Magnetic Field -> Electric Field -> Electromagnetic Wave Form)
These make up the five main components of a guided weapon
What are guidance, warhead, autopilot, propulsion, control surfaces