/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: aravindkumar31586526 https://cdn.slidesharecdn.com/profile-photo-aravindkumar31586526-48x48.jpg?cb=1721926950 Dr. Aravind Kumar Assistant Professor in Physics Kalindi Collage, University of Delhi East Patel Nager New Delhi-110008 Mob No +918755586210(UP), +919891829582(Delhi)