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Tag: optics

Using ray diagrams to better understand everyday reality – Demo

Using ray diagrams to better understand everyday reality – Demo

One of the easiest way to visualize ray diagrams for lenses is by using an array of arrows on the board as the object and the camera on your phone as the screen. (i) Convex Lens : Arrows on the board are placed outside the focal length of the lens -> Inverted image (ii) Convex Lens :Arrows on the board are placed inside the focal length of the lens -> Magnified Erect image (iii) Concave Lens: Irrespective of whether you…

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Van Gogh’s The Starry Night, Turbulence and Adaptive optics

Van Gogh’s The Starry Night, Turbulence and Adaptive optics

Van Gogh’s The Starry Night is a stunning painting that artistically brings out the effect of turbulence in our atmosphere. And this turbulence of air in addition to the effect of varying refractive index of the layers in our atmosphere causes the twinkling of stars: If you are an astronomer trying to study the cosmos from the earth, this turbulence of air and twinkling of stars is a total nightmare. The last thing that you want the light that painstakingly…

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