It carries electromagnetic energy between Travels much faster than sound at 300,000 km per second (186,000 miles Travels at over 1000 km/h (600 mph)-so it is both quick and invisible. Traveling in the same way that you can see waves on the ocean? Sound This time, waves of light energy travel out from the lamp in allĭirections.
Similar happens if you switch on a lamp in the middle of a dark room. These travel through the air, makingĪir molecules vibrate in sympathy, carrying sound energy in allĭirections until it dissipates and gradually disappears.
#Just into the waves skin
As the drum skin bounces back and forth, it
Stick, you make the drum skin vibrate up and down with kinetic energy Kettle drum in the middle of a football stadium. Think about a couple of familiar examples. Picture: Energy likes to travel outwards! In that respect, the waves you see riding the oceanĪre no different from the ripples you make in a washbasin when you let single drops hit the water surface Usually,Įnergy doesn't stay put: it tends to travel out in all directions to When energy suddenly appears,Ĭoncentrated in one place, something has to happen to it. A basic law of physics called theĬonservation of energy says that energy can'tīe created or destroyed it can only ever be converted into other forms. What exactly are they doing there? We usually find waves inĪ place where energy has appeared. Waves are always the first thing you noticeĮxcept on very calm days, there are always waves skimming across the
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