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user8469759

10:46

Q: Error in equation 2.1. in Ray Tracing Volume Densities

I am reading through Kajiya - Ray Tracing Volume Densities paper. And I've already got stuck into section 2. I wonder if there's a mistake in that equation. I'll quote the relevant bit The quantity to be calculated in a scattering problem is the energy per unit solid angle per unit area $$ dE = ...

As I think there's some physics in there, you might be able to help

Slereah

11:33

This book is doing a derivative of curve parametrizations for two different curves

I assume it makes sense in the context since there's a family of curves involved, but it is a bit muddy

3 hours later…

Obliv

14:44

@SirCumference What's up! I remember you being a very passionate student. How has your studying been going?

Sir Cumference

15:21

@Obliv Pretty good, starting a PhD program this fall

That's gonna be an experience

Obliv

@SirCumference Wow that's amazing! I remember when you were an enthusiastic high school student. How far you've come! I wish you the best. What area are you going to be working on?

Sir Cumference

Thanks a ton! I'm gonna focus on astrophysics, probably either stars or cosmology

How're things with you?

Obliv

Sweet, cosmology is fascinating. I'm doing well, my hiatus from school is ending soon since I found a relatively cheap way to finish up school. Turns out my school accepts a lot of CLEP exams which would soften the tuition costs.

I'm gonna be taking those, and transferring (hopefully) with a full ride to any school that'll take me :)

Sir Cumference

@Obliv That's great. Are you pursuing physics?

Obliv

15:36

I will be taking physics classes but I am not "pursuing" it :P

Sir Cumference

I see, what're you thinking of doing?

Obliv

I want to keep my options open for now. It will be a physics B.S. though

Sir Cumference

Gotcha. Well it's good that things are working out for ya

How've you been faring with the pandemic?

Obliv

@SirCumference I'm thinking of just living life to its fullest right now. Pushing myself to understand and grow etc. I don't wanna set goals I can't achieve.

Pandemic hasn't really affected me that much besides the first couple months. I don't travel, but I got vaxxed anyway for my job.

I also don't keep up with the news as much as I should, just bums me out.

Sir Cumference

@Obliv That's good :)

Yeah the news is kind of a nightmare lately

Obliv

15:46

What bums me out about it is the inherent biases and agendas media coverage has in relation to politics or whatever.

It's like I'm just listening to gossip at some point.

I just need to refine my news sources I guess.

I'm sure a lot of it is my own perception. My distrust comes from my lack of insight :P

Sir Cumference

@Obliv Nah that's just how most news is these days

Opinion pieces disguised as objective articles

Well maybe I'm just too pessimistic about it

I gotta go but it's been cool seeing ya again

Obliv

See you around (get it, because you're a circumference)

I'll see myself out.

Sir Cumference

I dunno whether to groan or steal that lol

Obliv

Hehe

4 hours later…

Physics Meta

20:07

Q: Why is this question closed? I am findin gno satisfactory answers from the personal comment

I have a question about my Physics Stack Exchange post: Can time dilation be used to prove that relatavistic mass does not really increase at speeds near c?