VISHAL PHYSICS TEST SERIES OPTICS M.M. 25 PASSING MARKS ARE 13 1. Define dispersion and derive prism formula. 3 2. Draw neat labeled diagram of microscope and telescope. 3 3. Deduce formula for mean value and r.m.s value of A.C. 5 4. What the magnification for simple microscope when image is formed at (i) least distant of vision (ii) infinity? 5 5. Why the colour of sky is blue? 2 6. What the reason of reddish sun in evening and morning.? 2 7. Derive lens formula amd mirror formula. 5