Page 1 CBSE TEST PAPER-01 CLASS - XII PHYSICS (Ray Optics) 1. A person is standing before a concave mirror cannot see his image, unless he is beyond the centre of curvature? [1] 2. For what angle of incidence, the lateral shift produced by a parallel sided glass plate is maximum? [1] 3. What are optical fibres? Give their one use? [2] 4. How the focal lengths of a lens change with increase in the wavelength of the light? [2] 5. Find the radius of curvature of the convex surface of a plane convex lens, whose focal length is 0.3m and the refractive index of the material of the lens is 1.5? [3] 6. Show that the limiting value of the angle of prism is twice its critical angle? Hence define critical angle? [3] 7. Draw a labeled diagram of telescope when the image is formed at the least distance of distinct vision? Hence derive the expression for its magnifying power? [3] 8. Prove that 2 1 2 1 n n n n R ? ? - = = When refraction occurs of a convex spherical refracting surface and the ray travels from rarer to denser medium. [5]Read More

Offer running on EduRev: __Apply code STAYHOME200__ to get INR 200 off on our premium plan EduRev Infinity!