What is a Black Hole?
WHAT IS A BLACK HOLE? The single thought that something so massive, so dangerous and so glutonous can exist out there in the universe has always sent a chill down my spine. Getting anywhere close to it leads to inevitable annihilation. But is there really no way out? And most importantly – what’s inside it? What is a Black Hole? How is a Black Hole Created? It is difficult to study a black hole formation directly because once a black hole exists, information about its origin cannot easily be observed. A black hole basically destroys its own origin. However, based on theories and observations, scientists believe the following: In the book Black Holes and Baby Universes, Stephen Hawking explains that when a black hole is created, it rapidly settles down and becomes a stationary object. Black holes are characterised by three parameters: This idea is known as the no-hair theorem.…
What is Gravity?
What is Gravity? What is Gravity? The story of gravity is deeply tied to Einstein’s Theory of Relativity (1915-1916). Einstein realized that the gravitational field is not something separate from space — it is the curvature of spacetime itself. Even after more than a century, General Relativity remains our best theory of gravity. What is Gravity Made of? What is the Purpose of Gravity? When that balance fails, the star collapses — sometimes forming a black hole, where gravity becomes so strong that not even light can escape. Some Phenomena of Gravity Newton’s Law of Gravitation – Is it Correct? Well, Newton was born before Einstein, and back then people believed that space was flat. So did Newton. But that doesn’t mean he hasn’t contributed the the work on gravity. His work and formula needed to be updated or enhanced. As Richard Feynman said in Six Easy Pieces: “Newton’s law…
What is Light? Why is the Sky Blue?
What is Light? Why is the Sky Blue? “We begin with light.[..] Light is like raindrops, each drop is called a photon and all the raindrops are of the same size. When we say light, we mean all aspects of light.” – Richard Feynman What is light? Light is more than just light. All of this is light, just different numbers. And it’s made of particles. What is light made of? The speed of light Why is the sky blue? Here is where I paused and asked myself: if the red light has a longer wavelength, how come it doesn’t scatter more easily than blue? This is due to a phenomenon called Rayleigh scattering. When light is traveling to Earth, it hits the atmosphere and interacts with molecules like oxygen and nitrogen. Rayleigh scattering is stronger for shorter wavelengths — specifically, intensity is inversely proportional to the fourth power of…