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What is the light


Visible light is part of the electromagnetic spectrum extending from 700 nm wavelength, up to 400 nm wavelength, in other words visible light is a part of the electromagnetic wave that is generated and has all wavelengths.
There are many attempts to measure the speed of light throughout history. It is logical and logical to think of the law of speed, which states that it is equal to distance divided by time, but with light, it is not that simple, it is very fast, Which is equal to (299,792,458 m / s).

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How to Determine the Age of a Parrot

In most parrots, if there is a line or strip between the head and the skin cap, the parrot is less than 3-4 months old. If there is no bar in this location, it means that the parrot has changed its feathers at least once. More than 3-4 months. Some parrot birds can not apply this test to determine their age, namely lutino birds, and the parrot (Albino) which has no feather marks due to a genetic mutation.
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The largest crocodile species in the world

There are 14 known species of crocodiles in the world now living on five different continents, but the largest of these species is the so-called saltwater crocodile, which is also the largest surviving creature of the reptile group, and is the largest predator animal living on the land in the world. The length of the crocodile is usually four meters long, but its weight can reach a full ton.
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