[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]
2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

View post   
File: 48 KB, 1087x774, KgVTI.png [View same] [iqdb] [saucenao] [google]
1950078 No.1950078 [Reply] [Original]

>> No.1950099

That ... is actually how it works, only with a lot more powerful light, and a lot more reflective umbrella. Preferably one that can withstand the amount of power being beamed at it.

>> No.1950117

http://en.wikipedia.org/wiki/Solar_sail

>> No.1950119

>>1950078
Moar troll physics please.

>> No.1950124
File: 92 KB, 964x717, Stealth.png [View same] [iqdb] [saucenao] [google]
1950124

Problem?

>> No.1950126

>>1950099
>>1950117
And what speed does it go at again? I can't seem to find this answer on Google.

>> No.1950129

reverse troll physics.

though it doesnt push you at the speed of light per se.

energy of the photon is h*f where h is planxs constant and f is frequency.

your kinetic energy is approx (no relativity here) 1/2mv^2 where m is your mass and v is your velocity.

hf=1/2mv^2
v=sqrt(2hf/m)

in fact, this is how the planetary society is doing it.
http://www.planetary.org/programs/projects/innovative_technologies/solar_sailing/

>> No.1950132
File: 27 KB, 605x580, 1285892292546[1].png [View same] [iqdb] [saucenao] [google]
1950132

>>1950119

>> No.1950134

>>1950126
>http://en.wikipedia.org/wiki/Radiation_pressure
If your solar sail is reflective you can double the effective radiation pressure.