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A light field, or lightfield, is a vector function that describes the amount of light flowing in every direction through every point in a space. The space of all possible light rays is given by the five-dimensional plenoptic function, and the magnitude of each ray is given by its radiance.
[4] [5] In this sense, gamma rays, X-rays, microwaves and radio waves are also light. The primary properties of light are intensity, propagation direction, frequency or wavelength spectrum, and polarization. Its speed in vacuum, 299 792 458 m/s, is one of the fundamental constants of nature. [6]
Raja Ali Haji was born in Selangor (although some sources stated that he was born in Penyengat) [4] in 1808 or 1809, [5] and was the son of Raja Ahmad, who was titled Engku Haji Tua after accomplishing the pilgrimage to Mecca. He was the grandson of Raja Ali Haji Fisabilillah (the brother of Raja Lumu, the first Sultan of Selangor). [6]
Ishak was the first with the idea to publish the Utusan Melayu (The Malay Post) newspaper and subsequently became the founder of the publication. [5] He left Warta Malaya (Malayan Times) and travelled to Pahang, Kelantan and Terengganu to campaign for the establishment of the Utusan Melayu Press. He worked at the paper under Abdul Rahim Kajai ...