AIEEE 2006 | Geometrical Optics Question 185 | Physics

The refractive index of a glass is $$1.520$$ for red light and $$1.525$$ for blue light. Let $${D_1}$$ and $${D_2}$$ be angles of minimum deviation for red and blue light respectively in a prism of this glass. Then,

$${D_1} < {D_2}$$

$${D_1} = {D_2}$$

$${D_1}$$ can be less than or greater than $${D_2}$$ depending upon the angle of prism

$${D_1} > {D_2}$$

AIEEE 2005

MCQ (Single Correct Answer)

-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

$${{36} \over {\sqrt 7 }}$$

$${36\sqrt 7 }$$

$${4\sqrt 5 }$$

$${36\sqrt 5 }$$

AIEEE 2005

MCQ (Single Correct Answer)

-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

$$-1$$ $$D$$

$$1$$ $$D$$

$$-25$$ $$D$$

$$25$$ $$D$$

AIEEE 2004

MCQ (Single Correct Answer)

-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

$$60$$ $$cm$$

$$30$$ $$cm$$

$$20$$ $$cm$$

$$80$$ $$cm$$

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