Bending light

History!

• For hundreds of years, we know the effects of gravity (Pull of the earth).
• But we had no idea how it worked. In Einstein’s view, gravity is a fundamental part of the universe.
• It bends, twists and ripples as objects move.
• The first scientist who worked on this was Sir Isaac Newton.
• He devised that gravity affects light.
• He measured changes with the help of photography, 

Achievements!

• Over a century later, Einstein developed his theory of general relativity. 
• Einstein said that general relativity explains the bending of light.
• The universe is not simply space, but a more complex existence called space-time, which is warped, twisted or bent out of shape by heavy objects.

Success!

• However, the first successful attempt was in 1919.
• The gravitational deflection of light is measured.
• Two British groups took photographs of a region of the sky. 
• Photographs were taken between two Solar eclipses.
• The results showed that light was deflected or bent.
• Measurement was done on the repetition of eclipses.
• In 1967 the measurements with a set of radio telescopes gave much greater accuracy.

Conclusion

• In addition, high accuracy deflection of light has been a great boon to studies of the universe.
• In addition, masses acting as gravitational lenses have now become a standard tool of astronomy.

Similar Stories

• New Research Sheds Light on Earth’s Secret Gravity!
• Leonardo Vinci realised gravity before Newton!

Watch a video

Here is a short video to explain the concept

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