Recent content by iVenky

London penetration depth that's defined for superconductors has a similar equation to skin depth in conductors derived from maxwell's equations. Are they equivalent?

I really appreciate you spent some time drawing the diagram (the diagrams look amazing by the way). Thanks so much!

Thanks but I still don't get the intuition behind this (instead of math). Can you explain how the force changes in terms of field lines?

I am not able to intuitively understand the reasoning behind why the presence of dielectric between oppositely charged plates, let's say, reduces the force of attraction between the plates. I understand to some extent that electric field lines prefer to flow through dielectric (or insulator)...

Yes, the flow of river was the analogy that led me to this question.

I see, thanks for the answers. In that case, if I consider it as an electromagnetic wave and integrate the Poynting vector over a period of time, shouldn't the energy (over a period of time) be different depending on the velocity of the EM wave?

I have studied in high school that all chemical reactions obey conservation of mass, as the atoms are merely re-arranged, but when I read through special relativity, I was reading that you can show an infinitesimal change in mass (based on E=mc2) in combustion that's not noticeable that's being...

If I consider light as a stream of photons, then the amount of photons striking a light sensitive element should change based on velocity of the photons. The total energy for a given time should be different based on velocity, right? Is there anything wrong with my understanding?

I have a question. If the velocity of light from a point source of light depends on the direction, doesn't the intensity of light (which is a one-way measurement) change with direction? Clearly, we don't observe this, which means velocity is constant as well regardless of the direction.

Ah, I missed the small values near Age 0 when I plotted the data on excel. Got it. Thanks!

Thanks. This looks exponential. Is that right?

Yes, I saw a video where SN8 was really slow with the belly flop maneuver. Can't believe with my own eyes. Seems like magic!

I have a basic question. The motivation behind belly flop is to use air as brakes with higher surface area? And this gives us better control over landing? Pumped up for SN9!

Thanks for the reply. That's useful information that I didn't know before. I understand there are several factors affecting this, just curious to get an estimate. I see that the actuarial table gives the life expectancy. Do they also provide the probability of dying on a given day with age?

I don't intend to sound macabre, but I was having this thought if I have to quantify the probability of someone dying given his age (in days) how would I go about quantifying that with a minimal accuracy (ok if it's not accurate but I just need some number with days). Has anyone ever worked out...