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General Science / Can someone please explain how what is shown in this photo happens?
« on: 23/12/2020 21:12:18 »
First time posting. I am 66 years old, and the attached photo has been a mystery to my family for 59 years. When I was a child, we lived in Cupertino, California. We had a large, redwood planter on the edge of our concrete patio. This planter measured approximately 10' x 10' and was approximately 20" high. The planter was filled with soil, and we would pull a 1.25" diameter garden hose from a hose bib on the side of the house, over to the planter and water the plants.
In the attached photo, you can see the hose resting on the surface of the patio on the right, and then bending/sagging up to the left where the hose eventually rested on the 20" tall planter. This photo was taken on a sunny day. One would think that the shadow cast by the draped garden hose would be a simple linear shadow of the hose above it. But as you can see, the shadow that was cast is that of a looped garden hose. This has always mystified us and we have no explanation for it. It is not a trick or a manipulation of the image. We ran and got a camera to document this phenomenon when we saw it. I'm hoping someone can explain why the shadow cast was that of a loop. Thanks.
SAGGING HOSE PHOTO WITH LOOP SHADOW.png (915.55 kB . 787x590 - viewed 3155 times)
In the attached photo, you can see the hose resting on the surface of the patio on the right, and then bending/sagging up to the left where the hose eventually rested on the 20" tall planter. This photo was taken on a sunny day. One would think that the shadow cast by the draped garden hose would be a simple linear shadow of the hose above it. But as you can see, the shadow that was cast is that of a looped garden hose. This has always mystified us and we have no explanation for it. It is not a trick or a manipulation of the image. We ran and got a camera to document this phenomenon when we saw it. I'm hoping someone can explain why the shadow cast was that of a loop. Thanks.
SAGGING HOSE PHOTO WITH LOOP SHADOW.png (915.55 kB . 787x590 - viewed 3155 times)