Home |
Search |
Today's Posts |
#38
|
|||
|
|||
Best position for a vegetable patch
"Glen Able" wrote in message ... OK, imagine an torch pointing straight down onto your work surface. (Or do it with a real one!) Now imagine it tilted at an angle - it's obvious that the same amount of light is spread out over a much greater area of the surface. Likewise there is less light energy per unit of surface area when the sun's lower in the sky. As Kay points out, there's also the effect that when the sun is lower in the sky, the light has to travel through more atmosphere is and gets dissipated by this. So you can't use an angled mirror at sunset to get the effect of noon at the equator! I did mention both those points in my original question. I still think the mirror has some benefit though - because the area of the mirror is greater than the area of the greehouse floor, it's getting more light into the greenhouse. I've drawn a diagram here : http://www.users.globalnet.co.uk/~sy...reenhouses.jpg In the standard greenhouse, some light just passes through without going near the plants. In the modified one on the right, the roof is asymetrical and internally mirrored on the side away from the sun so that that light gets redirected to the plants. I bet it wouldn't be an expensive modification and might make more of the little light we have. You could also mirror the vertical side as well. Maybe even tin-foil would do the job? -- Martin & Anna Sykes ( Remove x's when replying ) http://www.users.globalnet.co.uk/~sykesm |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Raised vegetable patch advice | United Kingdom | |||
Preparing a vegetable patch | Edible Gardening | |||
vegetable patch. | United Kingdom | |||
vegetable patch (borders) | United Kingdom | |||
ADVERT: Plant-It Vegetable Patch Kit for Children | United Kingdom |