dolphin wiki:
>For other uses, see Dolphin (disambiguation). See article below. Dolphins are certain aquatic mammals related to whales and porpoises. The name is from Ancient Greek delphis meaning "with a womb", viz. "a 'fish' with a womb". The word is used in a few different ways. It can mean:Any member of the family Delphinidae (oceanic dolphins),Any member of the families Delphinidae and Platanistoidea (oceanic and river dolphins),Any member of the suborder Odontoceti (toothed whales; these include the above families and some others),Used casually as a synonym for Bottlenose Dolphin, the most common and familiar species of dolphin.
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light wiki:
>For other uses, see Light (disambiguation). Light is electromagnetic radiation with a wavelength that is visible to the eye (visible light) or, in a technical or scientific setting, electromagnetic radiation of any wavelength. The three basic dimensions of light (i.e., all electromagnetic radiation) are:intensity (or brilliance or amplitude), which is related to the human perception of brightness of the light,frequency (or wavelength), perceived by humans as the color of the light, andpolarization (or angle of vibration), which is not perceptible by humans under ordinary circumstances. Due to wave-particle duality, light simultaneously exhibits properties of both waves and particles. The precise nature of light is one of the key questions of modern physics.
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