Department Of Physics, Ramjas College, University Of Delhi

24/02/2020

Hi all, a reminder to register for the talks during the SKA week@Vigyan Samagam, happening at the National Science Center.

Astronomy Enthusiast, A vibrant set of lectures and activities await you at the National Science Center. You can register here: https://tinyurl.com/vqmuo9x

Please spread the word to interested students.

Ongoing at the National Science Center, Vigyan Samagam is a Mega-Science exhibition showcasing India's contribution to some of the biggest international collaborations on fundamental science and research. Each week between 21st January - 7th March, one of the Mega projects is being highlighted throu...

05/01/2020

18/07/2019

Physics explains why:

Solving the Borwein integrals involves substituting numbers in for the variable n. For example, for the first integral, when we substitute the numbers n = 1-7, we get the answer π every time. But when we get to n = 8, the answer is ever so slightly less than π, roughly π – 10^(-10)

For the second integral, substituting the numbers 1 through 56 for n gives the result π/2. But for n=57 the result is approximately π/2 - 10^(-110), and subsequent terms continue to decrease.

Things can become even more extreme: For one variant of the Borwein integrals, a constant value pattern holds for an astounding first 10^176 terms of the sequence, after which point the pattern finally breaks.

Patterns appear widely throughout nature and math, from the Fibonacci spirals of sea shells to the periodicity of crystals. But certain math problems can sometimes trick the human solver into seeing a pattern, but then, out of the blue, the pattern suddenly disappears. These illusive patterns crop u...

07/07/2019

Measurement derails the Schrödinger equation because of a peculiar phenomenon called quantum back-action. A quantum measurement influences the system being observed: The act of observation injects a kind of random noise into the system. This is ultimately the source of Heisenberg’s famous uncertainty principle.

But if pretty much everything is measured and known about the system — including the random consequences of the back-action — then you can build feedback into the measurement apparatus that will make continuous adjustments to compensate for the back-action.

A recent test has confirmed the predictions of quantum trajectory theory.

04/07/2019

On Floquet engineering and Polaritons.

"Our next order of business, though, will be to use these colliding photons to make topological 'fluids' of light. It is a tremendously exciting time." -Logan Clark (lead researcher)

Every type of atom in the universe has a unique fingerprint: It only absorbs or emits light at the particular energies that match the allowed orbits of its electrons. That fingerprint enables scientists to identify an atom wherever it is found. A hydrogen atom in outer space absorbs light at the sam...

20/04/2019

20/04/2019

10-Day CERTIFICATE COURSE TITLED "FOUNDATION COURSE IN ASTRONOMY & ASTROPHYSICS"
July 08-19 2019.
Department of Astronomy, Osmania University, Hyderabad.

Updated Notification: https://www.facebook.com/191103334387093/posts/1301588913338524/

19/04/2019

Physicists at the University of Zurich have developed an amazingly simple device that allows heat to flow temporarily from a cold to a warm object without an external power supply. Intriguingly, the process initially appears to contradict the fundamental laws of physics.

15/04/2019

Scientists believe that time is continuous, not discrete—roughly speaking, they believe that it does not progress in "chunks," but rather "flows," smoothly and continuously. So they often model the dynamics of physical systems as continuous-time "Markov processes," named after mathematician Andrey...