NAVEDTRA 14182 Flashcards
What term means MOVEMENT THROUGH A MEDIUM
Propagation
What is the definition of propagation
Movement through a medium
What can be described as a disturbance
sound/ light/ radio
Wave
What can be defined as a recurring DISTURBANCE ADVANCING through space with or with out the use of physical means
Wave motion
Which type of waves are waves in which the disturbance takes place in the DIRECTION of propagation
Longitudinal wave
What is the vehicle through which the wave travels from one point to another
Medium
What is the DISTANCE IN SPACE OCCUPIED by one cycle of a radio wave at any given instant
Wavelength
Wavelengths are expressed by which unit of measurement
Meters
Which wave property gives a relative indication of the amount of ENERGY the wave transmits
Amplitude
What is the number of vibrations in a cycle measured in
Hertz
Which term refers to the number of occurrences that take place in 1 second
Hertz
What is the TIME in which 1 cycle of an event occurs
Period
What is a wave called when it is directed at a mirror
Incident
What is the ANGLE between the REFLECTED wave and the normal wave called
Angle of reflection
What is the BENDING of a wave path when it meets an obstruction
Defraction
How does sound travel THROUGH A MEDIUM
Wave motion
What type of sounds are capable of being here by human ear
Sonics
The Navy has set an arbitrary upper limit for sonics at ______hertz and a lower limit at ______ hertz
Upper to 10,000 Hz
Lower to 15Hz
What 2 general groups may sound be broadly classified into
Noise
Tones
What are the 3 basic characteristics of sound
Pitch
Intensity
Quality
What is the frequency of sound called
Pitch
What is a measure of sound energy of a wave
Intensity
What are 2 basic physical properties that govern the velocity of a sound through a medium
Density
Elasticity
What is the ability of a strained object to recover its shape after deformation
(Think bubble or rubber band)
Elasticity
What property of a medium or substance is MASS PER UNIT volume of the medium or substance
Density
What is the velocity in FPS that sound will travel through the air at 32 degrees F
1087
What is the science of sound referred to as
Acoustics
What is the most complex sound wave that can be produced
Noise
What is light a form of
Electromagnetic radiation
About what is the speed of light (miles per second)
186,000 miles per second
What are the very small packets of electromagnetic energy that make up light
Photons
What is a large volume of light called
Beam
What is a narrow volume of light called
Pencil
How many times in 1 second can a light beam circle the earth
7.5 times
Which units are used to measure a wave length of light
Angstrom
Primary colors of light are _______
Red
Green
Blue
