https://www.learncbse.in/ncert-solutions-for-class-12-physics-chapter-9-ray-optics-and-optical-instruments/ NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12 Fri, 30 Oct 2020 07:41:22 +0000 hourly 1 https://wordpress.org/?v=5.4.6