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theory of relativity written with chalk on slate shown by young female

Maths problem at a rather run-down green-board, written in chalk

blackboard in the classroom isolated on white background

Computer screen displaying a large number of physics and math equations, suitable for use as a science background or illustration.

$An astrophysicist is sitting in front of a black board and a laptop computer.$

physical formula. Black school board. E mc2

Portrait Of Teacher By Blackboard In Classroom

Sacramento, California, USA - March 19, 2011: 1956 Israel postage stamp with a portrait of Albert Einstein to the right of his E=mc2 equation.

Image of a blackboard with mathematical expressions written on it

Beijing, China - January 5, 2012: US postage stamp Albert Einstein(1879-1955), a well known theoretical physicist.

Young mathematician looks at formula on blackboard to solve scientific problem in classroom

Chalkboard with many different math formulas on white wall, closeup

Blackboard with mathematical formula written with chalk

differential equation formula text background teaching engineering, teaching equations and formulas backgrounds for teaching presentations graphic background

$Sacramento, California, USA - December 11, 2008: A 1979 India postage stamp issued to commemorate the 100th anniversary of Albert Einstein's birth in 1879. Einstein (1879-1955) is world renown and his name has become synonymous with intelligence or genius.$

Science and black holes.Basic properties of black holes. A scientist writes physical and mathematical formulas on a blackboard with white chalk.Schwarzschild radius

$Portrait of mature adult teacher in front of green chalkboard. He is looking at camera and wearing a white lab coat and a yellow necktie.. Math formulas are written on blackboard. Shot in door with a medium format camera.$

Blackboard with different physical formulas written with chalk on light green wall

Richmond , Virginia, USA - July 22, 2013: Cancelled Stamp From San Marino Featuring The American Scientist, Albert Einstein. Albert Einstein Lived From 1879 Until 1955.

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