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Showing posts from December, 2019

How Do Night Vision Binoculars Work

Perhaps you never heard of night vision binoculars. You may have seen the use of night vision goggles in a movie where actors use the device to see something in the dark. But night vision binoculars are completely new to many people. In this post I will cover working principle of both night vision goggles and night vision binoculars. Let's first start with night vision goggles.    The working principle of night vision goggles  are the device detects infrared light emitting from an object. Infrared light is invisible to us. It is because this type of light has shorter wavelengths than visible or UV light. Light having shorter wavelengths cannot stimulate the receptors of human eyes resulting the invisibility of the light. Infrared light is divided into 3 categories. These are  Near infrared:  The wave-length of this IR light is close to visible light which is 0.7(micron) to 1.7(micron). Mid infrared: The wavelength range for Mid-infrared IR is 1.3 mic...

How to install arrow rest on recurve bow

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Arrow rest is a small component of a bow that archers often overlook. But the component is quite important for a bow because it helps to stabilize the arrow until you fire it to the target and hit it precisely. In other words, the component plays an important role when it comes to shooting something accurately. Recurve bows are quite popular among the archer community. It is because these bows come with affordability but not compromise with the power. There are some units of recurve bow that has built-in arrow rest. But not all models has such feature. It means your need to install an arrow rest. However, installing an arrow rest in a recurve bow is simple and  will be paid off in the long run. You can complete the i nstallation process only in two-steps. The first step is to clean the riser by wiping it with alcohol soaked soft fabric. Wiping the riser will remove grime or dirt from it from the previous attachment of the rest. Presence of trace amount of dirt in the riser wil...