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

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

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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? 
2. For what angle of incidence, the lateral shift produced by a parallel sided glass
plate is maximum? 
3. What are optical fibres? Give their one use? 
4. How the focal lengths of a lens change with increase in the wavelength of the light? 
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? 
6. Show that the limiting value of the angle of prism is twice its critical angle?
Hence define critical angle? 
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? 
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.  
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