Mar 6, 2013 - I want it to be clear that building a pinhole camera relies on your abilities. Known) then the focal length of the camera can be calculated.
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a given that object height 20 cm image height 5 cm v 25 cm we know that magnification m hi ho v u 5 20 25 u u 100 cm using leview the full answer
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You are observing a 20 cm-tall object in a pinhole camera (with a screen at the end like those you used in lab/recitation this week). The screen is 25 cm from the pinhole. The image on the screen is 5 cm tall. What can you say about the image? Upright, Reduced Inverted, Enlarged Inverted, Reduced Upright, Enlarged How far from the pinhole is the object? cm If you moved the object closer to the pinhole, the image on the screen would: lose focus stay in focus but decrease in size stay in focus but increase in size If you moved the screen farther from the pinhole, the image on the screen would: stay in focus but decrease in size stay in focus but increase in size lose focus If you were looking at two objects, one 50 cm from the pinhole and one 75 cm from the pinhole, which object would be in 'focus' on the screen? both object would be in focus the 75 cm object would be in focus the 50 cm object would be in focus can't determine from the information provided If you increased the size of the pinhole (so now no longer a pinhole), the image on the screen would: stay in focus but increase in size lose focus stay in focus but decrease in size
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1. The problem statement, all variables and given/known data
It's not a specific problem, persay...... I'm working on a science lab and I'm supposed to be deriving the height of an image created by a pinhole camera. Since I'm in a condensed Physics course, we are expected to figure out formulas on our own. I keep finding this formula: (height of image) / (height of object) = ( - distance of image) / (distance of object) And since Di = Do, it should work. The problem is, that formula is associated with curved mirror questions...a pinhole camera is something else. Will that formula work? It's the only one I can find to determine the height of image from distance of object and height of object. I really need help with this, I'm completely stuck and I have no idea what's right and what isn't. 2. Relevant equations 3. The attempt at a solution Comments are closed.
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