1
AIEEE 2005
+4
-1
A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is $${4 \over 3}$$ and the fish is $$12$$ $$cm$$ below the surface, the radius of this circle in $$cm$$ is
A
$${{36} \over {\sqrt 7 }}$$
B
$${36\sqrt 7 }$$
C
$${4\sqrt 5 }$$
D
$${36\sqrt 5 }$$
2
AIEEE 2005
+4
-1
A thin glass (refractive index $$1.5$$) lens has optical power of $$-5$$ $$D$$ in air. Its optical power in a liquid medium with refractive index $$1.6$$ will be
A
$$-1$$ $$D$$
B
$$1$$ $$D$$
C
$$-25$$ $$D$$
D
$$25$$ $$D$$
3
AIEEE 2004
+4
-1
A plano convex lens of refractive index $$1.5$$ and radius of curvature $$30$$ $$cm$$. Is silvered at the curved surface. Now this lens has been used to form the image of an object. At what distance from this lens an object be placed in order to have a real image of size of the object
A
$$60$$ $$cm$$
B
$$30$$ $$cm$$
C
$$20$$ $$cm$$
D
$$80$$ $$cm$$
4
AIEEE 2004
+4
-1
A light ray is incident perpendicularly to one face of a $${90^ \circ }$$ prism and is totally internally reflected at the glass-air interface. If the angle of reflection is $${45^ \circ }$$, we conclude that the refractive index $$n$$
A
$$n > {1 \over {\sqrt 2 }}$$
B
$$n > \sqrt 2$$
C
$$n < {1 \over {\sqrt 2 }}$$
D
$$n < \sqrt 2$$
EXAM MAP
Medical
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