Ray Optics Test 01 (Class 12, CBSE) Class 12 Notes | EduRev

Class 12 : Ray Optics Test 01 (Class 12, CBSE) Class 12 Notes | EduRev

 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] 
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