We have seen why ground – based telescopes cannot produce optical images with angular separations as small as their theoretical limit because...
An outstanding feature in the progress made in astronomy and astrophysics is the increasing focus on clarity resulting from technical innovations. The...
This is how adaptive optics works. Light from a star passing through the atmosphere ends up as a distorted wavefront as the...
One of the challenges is making the telescope is the high degree of smoothness needed for the mirror. By way of a...
We experience polarity of light when we wear a pair of sun-glass or look at a computer through an anti-glare filter. Starlight...
The inability to track stars even with big telescopes in the early days emphasized the need for a steer able mount. The...
Photography was used in astronomical studies. It was observed that a film can accumulate light over several second’s unlike the human eye,...
It was soon found that there was a practical limit for constructing large lenses. Such telescopes had to be long to get...
Despite all the progress in understanding the nature of light what Samuel Johnson said about light (quoted by Boswell in 1776) still...
In the early 1950’s a young man-born in India on 10, August, 1927-returned home from the United States. He had had a...
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