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Mainly Cosmology and Gravitation, some quantum theory

What does space-time look like from a photon’s point of view? | Posted on by Anuj Varma

 A frame of reference cannot ‘travel at light speed’. That frame would (if it DID make it to the c) see space collapse to a point in the direction of travel. So – there is nothing for it to ‘see’ … Continue reading

Does time stop for a photon? If so, how can it move (travel)? | Posted on by Anuj Varma

The photon’s time doesn’t ‘stop’ – as far as we can tell. Relativity doesn’t have frames of reference moving at c, so it’s not possible to define how fast time passes for a photon. Consider an observer traveling close to … Continue reading

Rare finds in Special and General Relativity | Posted on by Anuj Varma

Understanding the two theories of relativity is not just a pastime for physicists. There is something existential and comforting about imagining ‘riding on a light wave’ and how the Universe might look to such an observer. The glut of books … Continue reading

Starting with the de-broglie wave equation (1)   The MINUS SignThe minus sign denotes the fact that if we hold t constant and increase x we are moving “to the right” along the function, whereas if we focus on a … Continue reading

Self Learning Books–For Advanced Physics | Posted on by Anuj Varma

If you are looking to get back into the exciting world of physics (without skipping the math), here is a list of books (that I have personally tried and tested): Amazon.com Widgets Getting your feet wet Road to Reality – … Continue reading

Life outside earth versus INTELLIGENT life outside earth | Posted on by Anuj Varma

There are TWO SEPARATE questions when it comes to ‘life outside our planet’. Is there LIFE (any LIFE , even single cellular organisms) out there? Is there INTELLIGENT life – closer to that on our own planet? The first question’s … Continue reading

Table of Contents–Meeting 1 | Posted on by Anuj Varma

Problem Set 1 These are the contents of our first meeting – held on June 9th, 2015   Problem Set 1 Download Zip Recommended Reading List James Nearing – Mathematical Methods for Physics The Road to Reality – Roger Penrose

Running Sum of Randomly Generated Numbers | Posted on by Anuj Varma

Integers from 1 to N are randomly generated . Each integer has an equal probability of being selected and unlimited repetition is permitted. A running sum is maintained. Given any integer k, such that 1 <= k <= n , … Continue reading

Austin Advanced Physics Self-Learners Meetup | Posted on by Anuj Varma

The real task of the mathematical physicist | Posted on by Anuj Varma

What exactly IS a DIFFERENTIAL EQUATION and how does it arise in the first place? Most physics courses start by taking the equation as a GIVEN – not bothering to explain how it comes about in the first place. And … Continue reading