Thermite reaction is a reaction between iron oxide (III) or fe₂O₃ and Aluminium. It is a highly exothermic process and iron is produced in the molten state. It is used to join is used to join railway tracks or cracked ...

As the student has focussed a distant blue coloured building on the screen using a convex lens, a real inverted and diminished image is formed at the principal focus of the convex lens. As object is quite far, a diminished ...