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3 days ago · The speed of light in vacuum, commonly denoted c, is a universal physical constant that is exactly equal to 299,792,458 metres per second (approximately 300,000 kilometres per second; 186,000 miles per second; 671 million miles per hour).
4 days ago · Classically, electromagnetic radiation consists of electromagnetic waves, which are synchronized oscillations of electric and magnetic fields. In a vacuum , electromagnetic waves travel at the speed of light , commonly denoted c .
1 day ago · e. Electricity is the set of physical phenomena associated with the presence and motion of matter possessing an electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations. Common phenomena are related to electricity, including lightning, static electricity ...
2 days ago · Ozone is invisible but has a pungent smell like that of the air after a lightning storm. It is a short-lived species and half of it breaks down into O 2 within a day at normal temperatures and atmospheric pressure. Lightning [edit] Hazards due to lightning obviously include a direct strike on persons or property.
5 days ago · If the speed is 𝑣, the frequency is 𝑓, and the wavelength is 𝜆, then 𝑣 = 𝑓 𝜆. In free space, light moves at a constant speed of 3. 0 0 × 1 0 m/s. This constant is given the label 𝑐, so for light 𝑐 = 𝑓 𝜆. The wave model of light is useful for describing phenomena such as refraction.
4 days ago · When a primary cosmic ray enters the atmosphere, it will generate a large number of secondary particles via hadronic and electromagnetic cascades, which are distributed over a range many kilometers wide. This phenomenon is referred to as extensive air shower (EAS) . Due to acceleration or deceleration caused by strong AEF, the number and energy ...
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5 days ago · The detection and modelling of nine X-ray quasi-periodic eruptions from a nearby tidal disruption event shows that these eruptions arise in accretion disks around massive black holes, left behind ...
