With the help of Newton’s disc, prove that seven colours of the rainbow can be recombined and produce white light. Open Answer »
You are given three mirrors of different types. How will you identify each one of them? Open Answer »
Suppose we wish to obtain the real image of a distant tree. Explain two possible ways in which we can do it. Open Answer »
It was observed that when the distance between an object and a lens decreases, the size of the image increases. What is the nature of this lens? If you keep on decreasing the distance between the object and the lens, will you still able to obtain the image on the screen? Explain. Open Answer »
