A. They can travel through a vacuum. B. They travel faster in air than in water. C. They are a form of electromagnetic radiation. D. They need a medium to travel. 相关知识点: 试题来源: 解析 D。声音需要介质才能传播。选项 A 声音不能在真空中传播;选项 B 声音在水中传播比在空气中快;...
A wave that needs a medium (like air, water, or even a rope) to travel through. Sound waves are a good example! Electromagnetic Wave A wave that can travel through empty space (like a vacuum) and doesn't need a medium. Light waves are electromagnetic waves, which is why we can see...
Chapter14-Waves•Awaveisarhythmicdisturbancethatcarriesenergythroughmatter•Wavesneedamaterial(medium)totravelthrough.•Thisiswhysounddoesn’ttravelthroughavacuum•WavePulse–asingledisturbance•ContinuousWave–continuousdisturbance•Transverse–awavethatmovesperpendiculartothedirectionofmovement.Ex:light•...
waves,radiowaves,x-raysetc)cantravel throughthespacewiththeconstantspeed withoutthepresenceofanymedium.They arecomprisedofelectricandmaicfield oscillatingperpendiculartothedirectionof waves. 2PreparedbyFaisalJaffer,EmiratesPrivateSchool,AlAin Generalwaveproperties: Wavelength(λ): Thewavelengthofawave,representedby...
Unlike mechanical energy, electromagnetic energy does not need a medium to travel through. This is because the type of energy that is transported by electromagnetic waves is light and heat energy. Electromagnetic waves include light, radio waves, and x-rays, which all travel at the same speed ...
Unlike water waves, light waves follow more complicated paths, and they don't need a medium to travel through. When the 19th century dawned, no real evidence had accumulated to prove the wave theory of light. That changed in 1801 when Thomas Young, an English physician and physicist, designe...
fields. the light you see, the colours around you are visible because of electromagnetic waves . one interesting property here is that unlike mechanical waves, electromagnetic waves do not need a medium to travel. all electromagnetic waves travel through a vacuum at the same speed, 299,792,458...
wave when it passes over from one medium to another. The phenomenon is most noticeable in light waves and is rarely seen in sound waves, as they tend to travel through a single medium (air). Nevertheless, sound waves get refracted when wavefronts travel in a medium with varying ...
a disturbance or variation that transfers energy progressively from point to point in a medium and that may take the form of an elastic deformation or of a variation of pressure, electric or magnetic intensity, electric potential, or temperature ...
Move energy through matter or space Two Types of Waves Mechanical Waves need matter (medium) to travel through Electromagnetic Waves can travel through empty space Mechanical Waves water air solids Mechanical waves travel through mediums such as: Mechanical Waves • May be longitudinal • Or tran...