To build a simple refractory telescope similar to the first telescopes and understand how it works. (Image 1), Take your magnifying glass or remove one of the bigger lenses from your binoculars. Less practical, but it'd work. But most objects don't emit their own light, the colour that we see most objects as in our universe is actually composed of the colours of light that the object reflects. Put an object a foot away from the telescope. (Image 2), If you compare the two lenses, you will see that the magnifying glass or binocular lens is stronger than the glasses lens. (Image 11). Put the first tube inside the second tube. There are various types, some with longer wavelengths than visible light and some with shorter. Duct tape. These step-by-step videos will show you how to make your own For example, an object that appears to be blue reflects blue light and absorbs all of the other colours. This means the rays seem to come from a point that's closer or further away from where they actually originate—and that's what makes objects seen through a lens seem either bigger or smaller than they really are. This doesn't matter very much Trace the bulb well from one side to the other using a pen to get the right shape and measurement of the bulb. (Image 12). Cut straight along the length of the corrugated paper Attach the lens from the magnifying glass to the end of the tube. High quality images from NASA showing the Sun and planets of the solar system, Aimed at teachers, this short video clip tells you the basics about a range of different types of telescopes. But light also comes from other sources, such as fires and light bulbs. Decorate your telescope with marker pens or felt tips. the first tube, so the first tube can move in and out of the second Some modern instruments that don’t contain lenses are still known as microscopes because they magnify objects. Sunlight often passes through drops of water in the atmosphere. Remove one lens from the pair of glasses. Regardless of its source, light always travels in straight lines and always at the same speed in open spaces. Observations, Data, and Conclusions. from kitchen wrap or aluminum foil). The larger objective lens collects lots of light from an object far away and then refracts or ‘bends’ that light, bringing it to a point near the bottom end of the telescope. On Earth, the main source of light is the Sun. This will help determine what size of water droplet produces the biggest magnification. They used it at sea to check the flags of approaching boats to identify whether they were friends or enemies. This way, you will have a tube with variable longitude and you will be able to focus the image. This will Tube #1, it be your ‘eyepiece’, the part that you will use to observe. activity can not be undertaken without first understanding the most important rule of sky watching: Pictures of the construction of the telescope. In space there is no up or down! Children can look for patterns in the stars and there are handy web links to help them identify constellations. Refraction, on the other hand, occurs when light passes through one transparent substance and into another, and bends. For example, light reflects off of a mirror. Light can move very fast, at about 300,000 kilometres per second. 1. Take your bulb and remove the end cover of the bulb and remain with the glass side only. That point is the focal point. Convex lenses are used in things like telescopes and binoculars to bring distant light rays to a focus in your eyes. MAKE A TELESCOPE WITH A LENS AND SOME FOIL It is also possible to make a telescope using aluminum foil and one lens. (Images 4), Pictures of the construction of the telescope. You'll notice that the image is inverted, that is, it's upside-down! Can you pick up ice with a piece of string? This will Tube #1, it be your ‘eyepiece’, the part that you will use to observe. If you want, you can put markings on the telescope to show where Faster than anything else in the Universe. build your own telescope. The slide will be magnifying 4 times or more, depending on the size of your drop. Pull the paper tightly. magnifying glass at either end. Glue the edges of the corrugated card together. The image of the print will look blurry. Draw a line on the corrugated paper to mark the diameter of For example, the scanning tunnelling microscope and the atomic force microscope measure the shape of a surface by measuring the distance between the microscope’s probe and the surface. But how do they work? During the second refraction, the separation is intensified. Telescopes were first created by the Dutch, a nation of sailors and sea explorers. Although, the shortest wavelength of all colours is violet. glass. In a convex lens the glass (or plastic) surfaces bulge outwards at the centre which makes parallel light rays passing through bend inward and meet (converge) at a spot just beyond the lens, known as the focal point. If you want a better view of birds, treetops, or even the night sky, you and your family can build your own simple telescope. You will also need strong glue, scissors, and a pencil. When you are done, place the second magnifying glass to the tube. 8 ), Pictures of the telescope sticks, approximately 3 1/2 feet glasses are the same size, telescope. Optional ) 2 cardboard tubes, diameter wider than the lens from telescope! This will tube # 1, it be your ‘ eyepiece ’, the separation is intensified binoculars. Treetops, and a sheet of printed paper foot away from the magnifying glass your and... 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