![optics - Does 'focal length' mean something different with lenses and pinhole cameras? - Physics Stack Exchange optics - Does 'focal length' mean something different with lenses and pinhole cameras? - Physics Stack Exchange](https://i.imgur.com/Rmy2GPU.png)
optics - Does 'focal length' mean something different with lenses and pinhole cameras? - Physics Stack Exchange
![Question 20 Using a pinhole camera a student observes the image of two of his friends, standing in sunlight, wearing yellow and red shirt respectively. What will be the colours of the Question 20 Using a pinhole camera a student observes the image of two of his friends, standing in sunlight, wearing yellow and red shirt respectively. What will be the colours of the](https://byjus-answer-creation.s3.amazonaws.com/uploads/60e7df4424737982aa9fb83f_img_upload_solution_1646734456.png)
Question 20 Using a pinhole camera a student observes the image of two of his friends, standing in sunlight, wearing yellow and red shirt respectively. What will be the colours of the
How do calculate size of a pinhole camera when you have magnification, object size and distance of object? - Quora
![A pinhole camera is made from an 85 cm-long box with a small hole in one end. If the hole is 6.0 m from a 1.8 m-tall person, how tall will the A pinhole camera is made from an 85 cm-long box with a small hole in one end. If the hole is 6.0 m from a 1.8 m-tall person, how tall will the](https://homework.study.com/cimages/multimages/16/figure_1_page_8002180713438504246492.png)
A pinhole camera is made from an 85 cm-long box with a small hole in one end. If the hole is 6.0 m from a 1.8 m-tall person, how tall will the
![A tree, which is 200m away from the pinhole, produces an image of height 1cm, in a pinhole camera of width 20cm. Find the height of the tree.A) 30mB) 20mC) 10mD) 40m A tree, which is 200m away from the pinhole, produces an image of height 1cm, in a pinhole camera of width 20cm. Find the height of the tree.A) 30mB) 20mC) 10mD) 40m](https://www.vedantu.com/question-sets/11e0ab92-ed6f-4fed-8be5-11ac3d7373193859560936488375492.png)