12Mega diversity countries

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CONVEX LENS Convex lens is thicker at the centre and thinner at the edges. An optical lens is generally made up of two spherical surfaces. If those surfaces are bent outwards, the lens is called a  biconvex lens  or simply convex lens. These type of lenses can converge a beam of light coming from outside and focus it to a point on the other side. This point is known as the focus and the distance between the centre of the lens to the focus is called the  focal length of convex lens.  However, if one of the surfaces is flat and the other convex, then it is called a  plano-convex lens. Difference between convex and concave lens: There is another type of lens known as concave lens. The major differences between the two are: CONVEX CONCAVE This lens converges a straight beam of light. This lens diverges a straight beam of light. This lens is thicker at the centre and gets thinner as we move towards the edges. This lens is thi...
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Tricky question

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Albert and Bernard just become friends with Cheryl,and they want to  know when her birthday is.Cheryl gives them a list of 10 possible dates                      May 15             May 16            May 19                      June 17             June 18                      July 14              July 16                 August 14         Augus...
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Hawkings radiation

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Hawkings radiation is a black body radiation that is predicted to be released from black holes,due to quantum effect near the event horizon.It is named after English physicist Stephen Hawking who provided theoretical argument for its existence in 1974.Hawkings work helped to explain the result of Jacob Bekenstein who had predicted that black hole should have finite entropy. Hawkings radiation reduces the mass and energy of black hole and is known as BLACK HOLE EVAPORATION .Because of this black hole dont gain mass through other means are expected to shrink and vanish.This is abroad topic which is with many theories and predictions.                                         Clubscience                                         Ryan Rahman
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