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Unit 5/6

Waves light and sound Vocab

TermDefinition
Medium The material through which a wave passes.. Waves travel trough the material without actually moving the material with it.
electromagnetic wave The name of waves propagating(moving) through space, and also as photon/light particles traveling through space, carrying radiant energy. doesn't require a medium
transverse wave the name of waves that move the medium at right angles to the direction in which the waves are traveling.
longitudinal waves The name of waves that move particles parallel to the direction the wave is moving, “push-pull” waves.
surface waves What is a mechanical wave that typically is a combination of a transverse and longitudinal wave that creates tumbling waves like the ocean.
amplitude in a transverse wave – What is the height away from the “rest” position.
wavelength What is the distance between two corresponding parts of a wave.
frequency What is the number of complete waves that pass a given point in a certain period of time, measured in HERTZ
wave speed what is equal to the wavelength times the frequency?
reflection What are waves that bounce back named?
refraction What is the bending of a wave due to the wave moving from one type of medium into another.
interference When two or more waves meet, they interact. This interaction is called?
constructive interference What is the combining of waves to cause higher amplitude of any of the original waves
destructive interference when the combining of the waves produce a new wave with a smaller amplitude than the beginning waves it is called???
standing wave the combining of the incoming and reflected wave so that the resulting wave appears to be standing still is called a _____?
resonance What is it called when vibrations traveling through an object matches the natural vibrations of an object. I.e. an opera singer hitting a note and shattering a crystal glass?
sound wave What is a mechanical wave that is an oscillation of pressure transmitted through some medium (like air or water),
pitch What is it called when high frequency yields high sounds Low frequency yields low sounds?
Doppler effect What is the change in frequency of a wave (or other periodic event) for an observer moving relative to its source. It is commonly heard when a vehicle sounding a siren or horn approaches, passes, and recedes from an observer
decibel Loudness – A sound level is measured in ______?
radiation What is a process in which energetic particles or energetic waves travel through a vacuum, or through matter-containing media that are not required for their propagation.
speed of light commonly denoted c, what is the universal physical constant important in many areas of physics. Its value is exactly 299,792,458 metres per second,This is approximately 186,282.4 miles per second, or about 671 million miles per hour.
electromagnetic spectrum What is the range of all possible frequencies of waves and radiation called?.
microwave What is used in microwave ovens to cook food, and is in cellular phones?
radio wave What are the Longest wavelengths & lowest frequency of the EMS? AM – Amplitude modulation: same frequency waves just a change in the amplitude to get different sounds etc. FM – Frequency Modulation: slight changes in frequency
infrared waves What is the energy called used in Fast Food Heat Lamps, or use as a night time surveillance tool.
visible light spectrum What is all of what human eyes can see is called??? These are the colors in order: (ROYGBIV) The Spectrum is the whole rainbow of color.
ultraviolet light What is the energy that is from the Sun which helps the body produce vitamin D, too much exposure can cause skin cancer
X-rays What is used extensively in medicine to see “into” the body
Gamma rays What is used in medicine to treat cancer or destructive radiation from nuclear explosions. Alpha, Beta and Gamma
transparent What is it called when a material transmits light – allows light to pass through it– like glass?
opaque What is a material that reflects or absorbs the light – can’t see through it. -wood
translucent If something allows some light to pass through it is known as____? hint: – can’t see image clearly – wax paper, frosted glass.
pigment What is a material that changes the color of reflected or transmitted light as the result of wavelength-selective absorption, used for coloring a medium like paint, using Cyan, Yellow & Magenta
primary colors of light The 3 colors of light that can combine to form all other colors are Red, Blue, Green (R, B, G)
Primary colors of pigment Magenta, Yellow and Cyan (simplified in elementary school as red, yellow and blue)
Does sound travel in space? Without a medium, air-liquid-solids, sound doesn't travel at all.
What does travel through space? An electromagnetic wave.
What type of a wave is sound? Longitudinal (with compression and rarefaction)
What type of a wave is an electromagnetic wave? It is made of 2 transverse waves. One being the "electro" wave and the second being the "magnetic" wave. It does not require a medium and will travel through space.
How do I know if any object is resonating at it's resonance frequency? It will vibrate, in sympathy with the sound, so the wave will keep increasing in amplitude. This is constructive interference.
Sound travels faster in what medium? It is according to density. The tighter the density the closer the atoms are and so the sound bounces atom into atom like a domino effect.
Draw and label a longitudinal wave practice to do this for the test.
Draw and label a transverse wave practice to do this for the test.
 

 



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