পৃথিবী গোল না সমতল |পৃথিবী গোলাকার নাকি সমতল |The earth is round or Flat bangla|Odvut |Bangla скачать в хорошем качестве

পৃথিবী গোল না সমতল |পৃথিবী গোলাকার নাকি সমতল |The earth is round or Flat bangla|Odvut |Bangla

পৃথিবী গোল না সমতল |পৃথিবী গোলাকার নাকি সমতল |The earth is round or Flat bangla |Odvut |Bangla..The bangla version... bangla.. The Bedford Level experiment is a series of observations carried out along a six-mile (9.7 km) length of the Old Bedford River on the Bedford Level of the Cambridgeshire Fens in the United Kingdom, during the 19th and early 20th centuries, to measure the curvature of the Earth. Samuel Birley Rowbotham .Odvut ovijan., who conducted the first observations starting in 1838, claimed he had proven the Earth to be flat. However, in 1870, after adjusting Rowbotham's method to avoid the effects of atmospheric refraction, Alfred Russel Wallace found a curvature consistent with a spherical Earth.Please subscribe to odvut ovijan channel At the point chosen for all the experiments, the river is a slow-flowing drainage canal running in an uninterrupted straight line for a six-mile (9.7 km) stretch to the north-east of the village of Welney. This makes it an ideal location for a direct measurement of the curvature of the Earth, as Rowbotham wrote in Zetectic Astronomy:Odvut ovijan channel. IF the earth is a globe, and is 25,000 English statute miles in circumference, the surface of all standing water must have a certain degree of convexity--every part must be an arc of a circle. From the summit of any such arc there will exist a curvature or declination of 8 inches in the first statute mile. In the second mile the fall will be 32 inches; in the third mile, 72 inches, or 6 feet, as shown in the following diagram: Earth's rate of curvature as shown in Zetetic Astronomy. Vertical exaggeration 1000x. ...[A]fter the first few miles the curvature would be so great that no difficulty could exist in detecting either its actual existence or its proportion...In the county of Cambridge there is an artificial river or canal, called the "Old Bedford." It is upwards of twenty miles in length, and []passes in a straight line through that part of the Fens called the "Bedford Level." The water is nearly stationary--often completely so, and throughout its entire length has no interruption from locks or water-gates of any kind;This my video name পৃথিবী গোল না সমতল। so that it is, in every respect, well adapted for ascertaining whether any or what amount of convexity really exists. Copyright DISCLAIMER : -------------------------------------- Copyright Disclaimer under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use. For more video Please subscribe my Odvut Ovijan channel.