The Truth Behind 'Orbs'

http://www.ghostgadgets.com/_knowledge/orbs.html
ความจริงวันนี้ เบื้องหลังปรากฏการณ์ที่เมื่อสักสองปีก่อนเรียกกันว่าถ่ายรูปติด"องค์จตุคาม"

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Diagram 1





   
Point "A" represents the camera lens's inverted focal point (the point that an object must be past to be in-focus), and "B" represents the way light travels into the lens. The dust particles that are closer than point "A" will be out-of-focus, and appear as false-positive dust orbs.

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Diagram 2






   
Point "P" represents the distance the dust particles are away from the camera lens, and "A" again represents the camera lens's inverted focal point (the point that an object must be past to be in-focus). This diagram shows how dust particles become out of focus as they get closer to the camera lens.


ตัวอย่าง

Contaminant: Out-of-Focus Dust

Camera: Hewlett-Packard PhotoSmart 315 Digital

Even though it looks like a mist, it's still just dust!





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