1.

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 ZOMN=106^(@) LM is another incident ray, which after reflection, passes through the point K having coordinates^,, 0), such.that ZOML=76^(@). The point P (x_(2) , 0) is the pole of the spherical mirror and point C(x_(3) , 0) is the centre of the curvature of spherical mirror. In the figure side of each square is equal to 1cm. Q A point object is moving with velocity i + 4 j cm / sec with respect to ground. Find the speed of image with respect to ground, when it reaches [7/3cm,0cm]

Answer»

10 cm/s
15 cm/s
20 cm/s
25 cm/s

Answer :B


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