what is the image distance and image height?
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The magnification, m, is defined as the ratio of the image height to the object height, which is closely related to the ratio of the image distance to the object distance: A magnification of 1 (plus or minus) means that the image is the same size as the object.
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Try clicking on the image, then long press and choose open image in new tab. This should give you a good idea of how big the image is. Then long press and save the image. Note: the mobile version of Google Images does have search tools too (its at the extreme right in the bar with tabs for web, images, videos etc.)
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['Click Finder on your Dock.', 'Find the image you want to check.', 'Control+click (ctrl+click) your image. A menu appears.', 'Click Get Info. A window appears.', "Expand the General: section to see your image's file size.", "Expand the More Info: section to see your image's dimensions."]
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4 Answers. The relationship is a simple inverse, i.e. If you keep the same object and the same focal length you get: size = 1/ distance (the =-sign should be proportional-sign). Inversely linear is a good approximation.
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Facebook Cover Photo Dimensions According to Facebook, your cover photo displays at 820 pixels wide by 312 pixels tall on computers and 640 pixels wide by 360 pixels tall on smartphones. This is a great starting point, but of course it's never quite that simple.
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Image size and file guidelines Channel art looks different on desktop, mobile and TV displays – larger images may be cropped. For the best results on all devices, we recommend uploading one 2560 x 1440 px image.
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Recommended dimensions for the static image is 300 x 250 for the larger side view or 300 x 60 for the smaller side view. Actual recommended video dimensions are: 426 x 240 (240p), 640 x 360 (360p), 854 x 480 (480p),1280 x 720 (720p), 1920 x 1080 (1080p), 2560 x 1440 (1440p) and 3840 x 2160 (2160p).
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By making the image distance twice the object distance ( i = 2 o), then : 1/f = 1/o + 1/(2o) = 2/2o + 1/2o = 3/(2o), so f = 2o/3 or o = 1.5f. that makes object distance 75cm.
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One megabyte is equal to 1024 kilobytes. So to find the total image size in megabytes, divide the number of kilobytes (43,139.94) by 1024, which gives us 42.1 megabytes (or MB, although for whatever reason, the Image Size dialog box shortens "MB" to just "M"). Photoshop agrees with our calculations.
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DPI of digital image: DPI means Dots Per Inch. This number is calculated using your digital image's pixel dimensions and digital image size. In the table pictured below, the DPI is shown next to “Resolution” as 300 pixels/inch.
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HD is about 6-10 inches tall in NATIVE resolution. Human field of vision is approximately 3 feet tall at the eye, not deep. Of course we can see more than 3 feet at a time, but not more than 3 feet of actual field of view.
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If we want to find the magnification, image size, and image distance, we can start by writing our equation like this: M = (hi/ho) = -(di/do) Right now, we know ho (the height of the action figure) and do (the distance of the action figure from the lens.)
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Starting from a large value, as the object distance decreases (i.e., the object is moved closer to the lens), the image distance increases; meanwhile, the image height increases. At the 2F point, the object distance equals the image distance and the object height equals the image height.
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In math, height can be defined the vertical distance from the top to the base of the object. It is measured in cm, inches, meters, etc.
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For plane mirrors, the object distance (often represented by the symbol do) is equal to the image distance (often represented by the symbol di). That is the image is the same distance behind the mirror as the object is in front of the mirror.
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In JavaScript, you can use the clientHeight property which returns the height of an element, including its vertical padding. Basically, it returns the actual space used by the displayed content. For example, the following code returns 120 which is equal to the original height plus the vertical padding.
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There are three main factors that determine the size of an image file: pixel dimensions; image format; and colour depth. This refers to the number of pixels in an image: the more pixels that are present, the larger the file size will be.