Materials Required A Black chart paper. A big funnel. Pin. Torch light. How to do it Preferably do this experiment at night. First cut the black chart paper and paste it on the wide part of the funnel tightly. Then make holes small and big with the pin on the paper. Switch off all the lights. Stand before a wall. Now flash the torch light inside the tapering part of the funnerl. The light should not be seen out. It should be seen only through the chart paper. The right will be projected on the wall and gives the effect of planetarium.
How to do it