𝐀𝐫𝐭𝐡𝐢 𝐑𝐚𝐠𝐮𝐫𝐚𝐦 on Instagram: "Let’s make Chalk from Egg Shell 🐣 Things needed to make a chalk 1.Egg shell 2.Flour 3.Natural Dye ( we used - Beetroo, carrot, turmeric powder, moringa powder, butterfly pea) Preparation: * Collect the eggshells, rinse them well or preferably boil & wash. Let it dry, and grind them into a fine powder. * In a small bowl, mix 1 tsp of natural dye with 2 tsp of hot water and stir. * Add 1 tbsp flour and 1 tbsp eggshell powder the mixture will look clumpy at

ELi5 | SM on Instagram: "Optical fibre works on a simple but elegant idea. Light likes to travel in straight lines, but when it moves from one material to another, it can bend or reflect depending on the angle. Engineers use this behaviour to trap light inside a very thin strand of glass. Even though glass feels fragile, these strands are made extremely pure and flexible, allowing light to move through them with very little loss. Because light is the fastest thing in the universe, using it to se