Bulb used as convex lens

[thinhnghiem]

Dear all
I have used a bulb which is filled in with water, it works like a convex lens to concentrate solar energy.
The performance of the water bulb gets highest level when I incline the bulb like in the clip. Solar light beam focus on a bigger dot, in compared with the dot when let the bulb standing vertically.

See my clip at

https://www.youtube.com/watch?v=f0Nvc6Q_Ulw

[Sensei]

Why don't you show what voltage and amperage is on solar panel alone,

and then the one which has concentrated beam of light from light bulb.. ?

This way you will have the real data, and compare difference.

If you don't have some solar panel (even such for toy), you could use f.e. photoresistor/photodiode/photoelement instead (they're pretty cheap to get from electronic equipment shop).

 

Actually you could use round-bottom flask 1L+ from chemistry laboratory equipment shop.

They have much larger diameter than light bulb.

Edited June 15, 2016 by Sensei