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Nov 14, 2024 · Light is electromagnetic radiation that can be detected by the human eye. Electromagnetic radiation occurs over an extremely wide range of wavelengths, from gamma rays with wavelengths less than about 1 × 10 metres to radio waves measured in metres.
If a source of light involves chemical reactions, fission or fusion, or is directly from electricity (like lightning), then it is referred to as luminescent. Most objects don’t give off light, they just reflect it. A good example is the moon. It doesn’t make its own light, it just reflects light from the sun.
Dec 7, 2022 · Light has the properties of waves. Like ocean waves, light waves have crests and troughs. The distance between one crest and the next, which is the same as the distance between one trough and the next, is called the wavelength .
IIT JEE Study Material. Properties of Light. Light is a form of energy that causes the sensation of vision. Different theories on the nature of light were proposed on the basis of the fact that energy can be transferred from one point to another, either by particle motion or by wave motion.
18 hours ago · Photon Applications. Lasers: Lasers work by emitting photons of the same energy, creating a focused beam of light. This technology is used in everyday devices like barcode scanners and printers and even in medical treatments such as eye surgery (e.g., LASIK). Photosynthesis: In plants, photons from sunlight are absorbed by chlorophyll and other ...
Apr 29, 2010 · Chemiluminescence: The generation of light directly from a chemical reaction, e.g. the light from glow-worms, and chemiluminescent light sticks. Electroluminescence: The direct generation of light from electricity, e.g. in the display screens of mobile phones.
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Key Points. The electromagnetic spectrum includes common regimes such as ultraviolet, visible, microwave, and radio waves. Electromagnetic waves are typically described by any of the following three physical properties: frequency (ν), wavelength (λ), or intensity (I).
