when we look at the night sky , we can see thousands of stars twinkling , but we cant actually say how far away those stars really are.It is one of the amazing as well as limiting factor that all the stars look like they are at same distance from earth as all other stars.…… Continue reading Distance to a far away star!!!
when we talk about light, the first thing that comes to our mind is its dual nature. We all know that light is an electromagnetic wave in a visible region from 400nm to 700nm wavelength. We also know that light behaves as packets of energy called photons. But why does it exhibit dual nature? what…… Continue reading Light as messenger of Universe
In Primary school, when Science teacher told us all about the Sun and the planets, it was really very hard to believe that Earth rotates and also revolves around the Sun with very high speed and how is it even possible for us to not have slightest sense about this motion. I believe this might…… Continue reading What if Earth misses a beat??
Few hundred years ago, everyone could look up at the sky and enjoy the beauty of Milky Way.But now as we all know we can hardly see countable number of stars.According to 2016 groundbreaking “World Atlas of Artificial Night Sky Brightness”, 80% of world’s population lives under Sky Glow or which is commonly known as…… Continue reading Sky Glow!! Where to find dark skies?…
What is a black hole? A black hole is a region where gravity is so strong that any light that tries to escape gets dragged back. Since nothing can travel faster than light, everything else gets dragged back too. So it is believed that you can fall into it and never get out again. It…… Continue reading A Simple Way of Understanding Black Holes