Q. Kaleidoscope was invented by __.
Solution:
A kaleidoscope is an optical instrument with two or more reflecting surfaces tilted to each other in an angle, so that one or more (parts of) objects on one end of the mirrors are seen as a regular symmetrical pattern when viewed from the other end, due to repeated reflection.
John Barber – gas turbine.
Tim Berners-Lee – World Wide Web
Alan Blumlein – Telecommunication engineer
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