In the adjacent figure ‘OX’ is the principal axis of a stationary spherical mirror (either concave mirror or convex mirror). NM is an incident ray, after reflection it passes through the origin O, such that∠OMN= 106 degrees . LM is another incident ray, which after reflection passes through point k having coordinates (a, 0), such that∠OML = 76 degrees . The point P (b, 0) is the pole of the spherical mirror and point C (c, 0) is the centre of the curvature of spherical mirror. In the figure side of each square is equal to 1cm Answer the following questions, best on the above paragraph. 11. Find the value of a (in cm)(A) 3(B) sqroot(3)(C) 2 (D) sqroot(5) 12. A point object is moving with velocity i+4j cm/sec with respect to ground. Find the speed of image with respect to ground, when it reaches (7/3 cm, 0 cm)(A) 10 cm/s (B) 15 cm/s(C) 20 cm/s(D) 25 cm/s

Harshit , 6 Years ago

Grade 12