The dedicated Science/Space thread!

[MiniMan64]

NismoGT said:

MiniMan64 said:

The ones I find really intrguing are the "dark planets" that the Japanesse found recently, they're really odd.

Whats that then?

The use of the word dark was perhaps misleading on my part, I was refering to the interstellar planets they reckon are out there.

[TheHeretic]

No matter what happens in science, you know it will increase our knowledge base. If something is predicted and evidence backs it up, superb. If it doesn't we know it will be looked at that little bit harder to figure it out, and reassess.

[nammynake]

R300will said:

Oxford uni interview question for physics buffs out there. Me and a friend (who had the interview) worked it out one bored physics lesson back in the day.

Q: How many photons are emitted from a 60W lightbulb every second? must show working.

Good luck

I'll have a bash (back of a fag packet):

Light build emits 10% of power as EMR, therefore 6W (=6 J/s)
Assume the light has a wavelength of 500 nm

Energy of a photon = h.f = h . c/wavelength = 6E-34 * 3E8 / 500E-9 = 4E-19 J

6 W = 6 J/s, therefore requires 6/4E-19 = 1E19 photons.

[TheHeretic]

So more than 4 then?

[dickymint]

Why a "dedicated science/space thread"? We have a whole forum!!!

[MiniMan64]

dickymint said:

Why a "dedicated science/space thread"? We have a whole forum!!!

I believe it was started before the new place opened for business.

[dickymint]

MiniMan64 said:

dickymint said:

Why a "dedicated science/space thread"? We have a whole forum!!!

I believe it was started before the new place opened for business.

Aha! That'll be it then. Ta.