Flashcards
waves - physics
Cards in this deck (46)
- 1what are the 2 types of wavestransverse and longitudinal waves
- 2what is a transverse wavea wave for which the oscillations are perpendicular to the direction of energy transfer
- 3what is a longitudinal wavea wave for which the oscillations are parallel to the direction of energy transfer
- 4what is the highest and lowest points of transverse waves calledpeak - highest
trough - lowest - 5examples of transverse wavesripples on water
vibrations on a guitar string
electromagnetic waves
seismic S waves - 6examples of longitudinal wavessound waves
ultra sound waves
seismic P waves - 7what are the 2 parts of a longitudinal wave calledcompression and rarefaction
- 8name all the waves in the electromagnetic spectrum from shortest to longest wave lengthgamma rays
xrays
ultra violet
visible light
infrared
microwaves
radio waves - 9what are gamma rays used forcause and treat cancers
kill mutated cells
shortest wavelength/highest frequency - 10what are xrays used fordetect bone breaks
can pass through flesh but not dense material like bones
Dangers: X-rays damage cells and cause cancers - 11what is ultra violet light used forover-exposure can cause cancer
used for sunbeds
fluorescent light
detect forgeries in passports/money
sterilize equipment - 12what is visible lightthe only light on the electromagnetic spectrum that humans can see
- 13what is infrared radiation and what is it used foremitted from all objects that have thermal energy
infrared cameras to see in the dark
to spot living organisms - 14what are microwaves used forused for heating food
communication using satellites - 15what are radio waves used forlongest wavelength/lowest frequency
transfer information from oscilloscopes
communication - 16what type of waves are electromagnetic wavestransverse waves
- 17what is a waves amplitudethe maximum displacement of a point on a wave from its undistributed position
- 18what is wavelengththe distance from the peak of the wave to the same point on the next wave
- 19what is the frequency of a wavethe number of waves that pass a given point each second
- 20unit used for frequencyhertz
- 21what do waves transferenergy
- 22wave speed equationwave speed = frequency x wave length
- 23what is reflectionwhen a wave bounces of a surface
- 24how do sound waves travel through a solidthe particles in the solid vibrate and send energy through
- 25frequency of human hearing20-20,000 hz
- 26what are ultra sound waveswaves that have a higher frequency than human hearing
- 27what are ultra sound waves used formedical or industrial imaging
- 28what are seismic P wavesthe fastest seismic waves and can move through solid, liquid, or gas
- 29what type of waves are seismic p and s waveslongitudinal
- 30what is refractionRefraction is the bending of waves as it passes from one transparent substance into another
- 31what natural event causes seismic p waves to be producedearthquakes
- 32what kind of medium can s waves travel throughonly solids
- 33what is echo sounding used forused to detect objects in deep water and measure water depth
- 34in which direction do waves refract when they enter a denser mediumthey bend towards the normal
- 35what is the normalan imaginary line perpendicular to the plane mirror
- 36what is the focal length of the lensthe distance from the length to the principal focus
- 37what are convex lensesthe can produce real or virtual images
- 38what are concave imagesthey only produce virtual images
- 39what does specular reflection meanreflection from a smooth surface in a single direction
- 40what does diffuse reflection meanreflection from a rough surface which causes scattering
- 41how does a red colour filter workit absorbs all the other colour in the colour spectrum and only lets red pass through
- 42what colour does the object appear if all the wavelengths are reflected the same amountwhite
- 43what colour does the object appear if all the wavelengths are absorbedblack
- 44what determines the colour of an opaque objectdifferent objects reflect different wavelengths by different amounts
- 45what colour of visible light has the longest wavelength and lowest frequencyred
- 46what colour of the visible light has the shortest wavelength and highest frequencyblue
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- User has deleted their subject information Flashcards on waves - physics, created by Deleted user on 15/05/2023.
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- Created by J J · May 13, 2023
- Copied by J J · May 15, 2023
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