The image shows a page from a textbook, with the number 21 at the bottom right corner, indicating it is page 21. The text discusses optical concepts like parallax and optical benches, and concludes with a section on "The Sign Convention" related to optics experiments. The page is lying on a surface with a dark and light checkered pattern, possibly a table or floor, and a portion of what appears to be a wooden object with a geometric design is visible in the background. There are no people or explicit Jalingo, Nigeria related elements visible in the image. in Jalingo, Nigeria

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Jun 28, 2026, 9:53 PM

Jalingo, Nigeria

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The image shows a page from a textbook, with the number 21 at the bottom right corner, indicating it is page 21. The text discusses optical concepts like parallax and optical benches, and concludes with a section on "The Sign Convention" related to optics experiments. The page is lying on a surface with a dark and light checkered pattern, possibly a table or floor, and a portion of what appears to be a wooden object with a geometric design is visible in the background. There are no people or explicit Jalingo, Nigeria related elements visible in the image.

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