Simple Kids Crafts is a video blog dedicated to reviving the old art of handicrafts for people of all ages. How do oil spills affect aquatic plants? A Miniature Solar Panel Fire Water Balloon Make Clouds in a Bottle Secret Messages Make a Rocket Make a Hovercraft Make an Anemometer Make a Sundial Make a Radio Make an Electroscope Make a Stethoscope Make a Telescope Make a Periscope Make a Camera Bending a stream of water with a comb Lighting a bulb without electricity Simple Motor Cotton Ball Rocks? Salt-Absorbing Art and Science Color Changing Glue Art Baking Soda Clay Oil Sun Catcher Grow a Pineapple Plant! Bead Bowls Wow, what an Air-Gun Funny Diver ! Water boils without fire Ice with Boiling Water Water that boils instantly Water boils in a Paper Pot Soap-driven Boat Pulse Moves Pin Pretty Garden—without Plants Picture made by Fire Magic Pictures Dancing Doll Smoke Goes Down The Dancing Coupl The Umbrella Dance Magic Butterfly Colorful ...
You must have heard about telescopes. If you are lucky you might have even seen one. A telescope is an instrument to view distant celestial objects, like the Moon, planets etc. Common telescope are called optical telescopes. They come in two varieties: refractors and reflectors. In refracting telescope (refractors), the optical system consists of lenses. Both the Objective (the optical system at the front end of the telescope) and the eyepiece (the optical system used to look through the telescope) are lenses. In the reflecting telescopes the objective is a parabolic mirror and the eyepiece is made of lenses. The telescopes used by astronomers are often huge and cannot be constructed very easily. Often the most difficult job when a young enthusiast decides to make a telescope is to find lenses or mirrors. But we have found a design that is suitable for most young students in India. Parabolic mirrors for a reflecting telescope must be ground, which is rather arduous and time cons...