08 December Focal Length of Concave Lens By Concave Mirror – Viva Voice | Physics Class 11 Posted by EbookNepal.COM Categories Practical Exam, Viva Voice Viva Voice Questions With Answer Focal Length of Concave Lens By Concave Mirror For: Science Class 11 | Physics Q.1: What is a concave lens? Ans. The lens which is thinner at the centre and thicker at the edges Read More