Projection Projector Movie
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GE 29338 - DJL 150W 120V Projector Light Bulb $136.00 ... |
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GE 54240 Sea Shell Incandescent Night Light $8.50 DLH 250 WATT 120 VOLT PROJECTION LAMP PROJECTION BULB... |
Physics: Reflection and Refraction 2?
A cinema projectionist should know how to select the proper projection lens to fill the screen with an image of the movie film. Noting: The image of the movie film is 3.2 cm wide. In a particular theater, the screen is 10 meters of wide and is 30 meters from the projector. Find: a) What extension is necessary to fill the projection screen? b) How far the object is necessary to produce this increase? c) What should be the focal length of the lens? I am very confused with these questions, so if you could please give me an explanation Details ... that would be wonderful.
an increase) is the relationship between the size of the images. This should be: 10 meters / 3.2 cm = 100/3.2 = 1000/32 = 31.25. B) The image size is proportional to the distance of the lens, both the projected image and the image of the film. This means that since the distance the lens to the screen is 30 meters, the distance from the lens to the film should be reduced by the magnification factor. Therefore, it should be 30 meters/31.25 = 0.96 m = 9.6 cm. c) The information required on the approach is: 1 / (focal_length) = 1 / (image_distance) + 1 / (film_distance) Therefore, 1 / f = 1/9.6 cm + 1.30 m = 1 / (0.96 m) + 1 / (30 m) = 1075. Therefore, f = 1/1.075 = 0.9302 m = 9.3 cm is the focal length.
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HITACHI CP-X430W 16:9 HD HOME THEATER / COMPUTER PROJECTOR WITH DIGITAL HD INPUT US $232.50 (30 Bids) End Date: Wednesday Feb-08-2012 21:09:06 PST Add to watch list |
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100" Portable Tripod Projector Screen 4:3 Projection Stand Pull-up Matte White US $94.95 (0 Bid) End Date: Wednesday Feb-08-2012 21:22:19 PST Add to watch list |
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Shift3 Light Blast Entertainment Projector US $33.50 (10 Bids) End Date: Wednesday Feb-08-2012 21:56:37 PST Add to watch list |
Projection on Buildings
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Open Air Cinema Home Outdoor Movie Projection Projector Inflatable Screen 12x7 $743.26 |
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