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An aquascope (also called bathyscope) is an underwater viewing device. It is used to view the underwater world often from dry land or a boat. It eliminates the water surface glare and allows viewing as far as water clarity and light permit. The underwater viewer can be used for observing reefs, checking boat moorings, secchi disks and other ...
Snell's window (also called Snell's circle [1] or optical man-hole [2]) is a phenomenon by which an underwater viewer sees everything above the surface through a cone of light of width of about 96 degrees. [3] This phenomenon is caused by refraction of light entering water, and is governed by Snell's Law. [4]
Underwater vision is the ability to see objects underwater, and this is significantly affected by several factors. Underwater, objects are less visible because of lower levels of natural illumination caused by rapid attenuation of light with distance passed through the water. They are also blurred by scattering of light between the object and ...
A viewing instrument is a type of optical instrument that is used to assist viewing or visually examining ... spotting scope; stereoscope; stroboscope; tachistoscope ...
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Free viewpoint television (FTV) is a system for viewing natural video, allowing the user to interactively control the viewpoint and generate new views of a dynamic scene from any 3D position. [1] The equivalent system for computer-simulated video is known as virtual reality. With FTV, the focus of attention can be controlled by the viewers ...
Just make sure you can comfortably cover the higher out-of-pocket cost if you need to file a claim. This is especially important if you’re on a fixed budget without much wiggle room. Maintain a ...
The Free People Nightingale Cardi is a must-have for colder weather. It's versatile, comfy, and looks as good on a 60-year-old as it does a 30-year-old. This best-selling oversized cardigan is an ...