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Light exists in two very different forms at the same time. One form is tiny particles called photons. The other form is waves. The easiest way to think about light is as waves. Light waves travel through space at a speed of about 186,282 miles per second (299,792 kilometers per second). Scientists use an idea called wavelength to describe light ...
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- What Is Light?
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When we're very young, we have a very simple idea about light: theworld is either light or dark and we can change from one to the otherjust by flicking a switch on the wall. But we soon learn that light ismore complex than this. Light arrives on our planet after a speedy trip from the Sun, 149 million km (93 million miles away). Light travels at186...
For hundreds of years, scientists have argued over whether light isreally a wave at all. Back in the 17th century, the brilliant Englishscientist Sir Isaac Newton (1642–1727)—one of the first people to studythe matter in detail—thought light was a stream of "corpuscles" or particles.But his great rival, a no-less-brilliant Dutchman named Christiaan...
Light waves (let's assume they are indeed waves for now) behave infour particularly interesting and useful ways that we describe asreflection, refraction, diffraction, and interference.
Mirrors. Smooth water. Metal. Smooth and shiny surfaces. The Moon is a reflector of light. Mirrors are reflectors of light. You can see the reflection of the trees in the smooth water below. You can see the reflection of the Sun in the smooth water. Smooth and shiny surfaces are good reflectors of light.
Jul 22, 2020 · In this video we learn all about Light. We learn where it comes from and identify a number of sources of light. We also learn how we can change light throug...
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- Learn Bright
Where does light come from? Most light comes from heat. When something gets very hot, it usually gives off light. Some examples are a campfire, a stove burner, and the flame of a candle. They all produce heat and light! The largest and most important source of light we have is the Sun. (Read more about that below.) Most lights that we use come ...
Light from the Sun provides energy for life on Earth. Plants change the energy of sunlight into food energy. When light rays strike a green plant, some of their energy is changed to chemical energy, which the plant uses to make food out of air and minerals. This process is called photosynthesis.
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Hey Kids, have you ever thought what would we do without lights? Well, Liam is here to light up you! Watch the video so as to know interesting facts about li...
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- Liam by Liam
