Cassini, Rømer, and the velocity of light (2008)(fermatslibrary.com)

39 pointsby mgdo10 ปีที่แล้ว6 comments

Cassini, Rømer, and the velocity of light (2008)

http://fermatslibrary.com/s/cassini-romer-and-the-velocity-of-light

3 comments

Aelinsaar10 ปีที่แล้ว

I so rarely get to learn new words that I've never once encountered before, but this piece had one. "Prostapheresis"

Apparently it's an archaic trigonometric method for approximate multiplication and division.

Someone10 ปีที่แล้ว

https://en.m.wikipedia.org/wiki/Prosthaphaeresis

goldenkey10 ปีที่แล้ว

As a mathematician who is still in the learning phase and intuition is lacking, thank you. This method is ingenius and makes the invention of logarithms make even more sense consequentally. HN rocks :-)

Aelinsaar10 ปีที่แล้ว

That was a genuinely enjoyable read, thanks.

mrkibo10 ปีที่แล้ว

This is an interesting article about later additions to the quest to measure light's speed: https://www.physicsforums.com/insights/speed-light-galilean-...

unixhero10 ปีที่แล้ว

History of radio astronomy. It can't get much better than that.