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# Swapnil's Message board- III

Hi!

Due to excess comments in the last messageboard, I thought of posting the third version of it. Feel free to ask me questions or talk to me about any random topic. I would be happy if you discuss mathematics problems with me.

Regards,

Swapnil Das.

Note by Swapnil Das
11 months, 1 week ago

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Do you like Pigeons? · 11 months, 1 week ago

Lol no. · 11 months, 1 week ago

Why? They are so simple and soft... · 11 months, 1 week ago

They had done something strange on my head :P · 11 months, 1 week ago

@Pranshu Gaba Which branch did you take at the IISc? · 3 months, 2 weeks ago

There is just one branch in IISc for the first three semesters (1.5 years) in the undergraduate program. We have six courses for the each of the first three semesters: Physics, Chemistry, Biology, Mathematics, Engineering and Humanities. After three semesters, we will choose one of these subjects as a major and one subject as a minor. · 3 months, 2 weeks ago

What are you plans? What will you take? · 3 months, 2 weeks ago

Right now, I think I will take either Maths or Physics as major and biology as minor. However, I still have a lot of time to decide, and my preference changes very frequently. I have no idea what i'll end up taking. · 3 months, 2 weeks ago

I would really appreciate if you reply to this very question of mine. - Do photons possess mass?

It might be that they don't have rest mass, but have relativistic mass. Or do they don't have both?

@Michael Mendrin · 4 months, 3 weeks ago

There was a time when physicists weren't sure if neutrinos had mass. Now not only we know they do, we know that neutrinos have "oscillating" mass, i.e., can vary over time, not related to relativistic effects. Unlike neutrinos, however, photons are still considered to be true massless particles. There are very few "true massless particles", the other two being the gluon and the graviton. All three are gauge bosons, respectively of the electromagnetic, strong force, and gravitational forces. Because they have no rest mass, they always travel at the speed of light in free space. All other particles that have a rest mass can be found to be traveling at considerably less than speed of light in free space.

Physics experiments have been done where light travels very slowly, but not in free space. · 4 months, 3 weeks ago

Thanks a lot! · 4 months, 2 weeks ago

@Otto Bretscher Happy Birthday! · 8 months ago

Thanks, but it's not my birthday, actually ;) · 8 months ago

LOL, I suddenly I saw a change in your profile to 60. When is your B'day? I want to wish you. · 8 months ago

That change happened a few month ago, on January 27 ;) I usually spend my b-days with the Compañeros in Cuba, but this year, for the special occasion, we went to Alhambra, Granada, Al-Andalus, the most magnificent complex of buildings I have ever seen. · 8 months ago

Aww, I missed it :( · 8 months ago

Better late than never; I appreciate the thought. I can't wait to receive your message next year, in Havana, Cuba. What about your own b-day, Comrade? · 8 months ago

I am born on the 5th of December, it was very kind of you to ask me, Sir :) · 8 months ago

@Otto Bretscher Heppy Bday comrade! · 8 months ago

Did you know that he had is B'day? · 8 months ago

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What if I add the condition : If $$xyz=1$$ to the problem? Will the answer be correct then? · 8 months, 2 weeks ago

@Matt DeCross Would you do like to post some problems on thermodynamics? It shall be greatly appreciated, Thanks! · 9 months, 3 weeks ago

So, allow me to launch a topic for discussion, a number theory problem. This was the problem I had doubt in, but was unfortunately unable to get a nice solution. Can anyone provide one? · 11 months, 1 week ago