Sumitha teacher 28-9-11

                                            CERTIFICATION BY THE GUIDE

I here by certify that this project is done by Hari Gopinath and Hari.K.N from 29-8-11 to 23-9-11 as part of their Science Exhibition. They collected information from the following sources.

v Internet

v Books

v Information received through survey

                                                                                                                   Sumitha 

                                                                                                                 Physics teacher