MST Flashcards
PREPARE
It can travel through a medium & vacuum.
EM Waves
Repeated motion produced by a back-and-forth or up-and-down motion.
Vibration
Vibration produces _______
Waves
Vibration or disturbance of particles
Waves
Material that carries the wave
Medium
Give the types of Mediums
Solid, Liquid, and Gas
What does “Waves based on the nature of propagation” mean?
This means whether a material needs a medium
Types of Nature of Propagation
Mechanical Waves & Electromagnetic Waves
What is a mechanical wave?
A wave that requires a medium to propagate
What is an electromagnetic wave?
A wave that does not require a medium to propagate
Give 2 examples of mechanical waves
Ocean waves and Seismic waves
Give 2 examples of electromagnetic waves
Radio waves and Microwaves
What does “based on the direction of propagation” mean?
Waves classified according to how they move
Types of classifications based on the direction of propagation and what nature of propagation they’re under
Transverse waves-Electromagnetic waves
Longitudinal waves-Mechanical waves
Transverse waves are in what direction?
Perpendicular to the direction of the wave
Longitudinal waves are in what direction?
Parallel to the direction of the wave
What is a wavelength?
Distance between identical points
What is a period?
The time it takes a wave to complete a cycle
What is an amplitude?
The displacement from the equilibrium
What is a frequency?
number of wave cycles per second
The crest is?
The highest point of a wave
The trough is?
The lowest point of a wave
What is the equilibrium?
The resting position
Has the longest wavelength and lowest frequency
Radio waves
Who discovered radio waves?
James Clerk Maxwell
It is an electromagnetic wave that can be seen by human eye
Visible light
Who discovered visible light?
Isaac Newton
All objects can omit this type of wave
Infrared ray
Who discovered infrared rays?
Herschel
Has shorter wavelength but greater energy than visible light
Ultraviolet rays
Who discovered UV Rays?
Ritter
Its name means unknown ray
X-ray
Who discovered X-rays?
Roentgen
A wave used in a house furniture
Microwave
Who discovered microwaves?
Spencer
Has the highest energy and smallest wavelength
Gamma rays
Who discovered gamma rays?
Villard
Who named gamma rays?
Rutherford
AM means?
Amplitude Modulation
FM means?
Frequency Modulation
What does RADAR mean?
Radio Detecting and Ranging
RMIVUXG stands for?
Radio, Micro, Infrared, Visible Light, Ultraviolet, X-ray, Gamma ray
Unit for wavelength
m
Unit for frequency
Hz, s^-1, 1/s
The phrase to remember the conversion of units
King Herny Died By Drinking Cholocate Milk
What is a possible outcome of using UV Rays?
It can harm human health
Are microwaves typically safer for human exposure than gamma rays?
Yes
The complete distribution of electromagnetic waves
Electromagnetic Spectrum
Has the highest frequency in the visible spectrum
Violet
What year did Roentgen accidentally discover x-rays?
1895
Coined the term Gamma ray
Rutherford
Is it true that energy increases with frequency?
Yes
A wave has a frequency of 6.3 x 10^-8 Hz, what is its wavelength?
4.76 x 10^15 m
What’d be the frequency of a wave if the value of its wavelength is equivalent to 22m?
1.36 x 10^4 Hz
the reflecting surface is on the outer surface
Conver mirror
the reflecting surface is on the inner surface
Concave mirror
The point in the center of the sphere
Center of Curvature
distance between the vertex and focal point
focal length
between the center of curvature and vertex
focal point
imaginary line passing through the center of the mirror
principal axis
