1
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
A microscope is focussed on a mark on a piece of paper and then a slab of glass of thickness 3 cm and refractive index 1.5 is placed over the mark. How should the microscope be moved to get the mark in focus again ?
A
2 cm upward
B
1 cm upward
C
4.5 cm downward
D
1 cm downward
2
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
A beam of light composed of red and green ray is incident obliquely at a point on the face of rectangular glass slab. When coming out on the opposite parallel face, the red green ray emerge from
A
Two points propagating in two different non parallel directions
B
Two points propagating in two different parallel directions.
C
One point propagating in two different directions.
D
One point propagating in the same firections.
3
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
The refractive index of the material of a prism is $$\sqrt 2 $$ and its refracting angle is 30o. One of the refracting surfaces of the prism is made a mirror inwards. A beam of monochromatic light entering the prism from the other face with retrace its path after reflection from the mirrored surface if its angle of incidence on the prism is
A
45o
B
60o
C
0
D
30o
4
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will
A
become zero
B
become infinite
C
become small, but non-zero
D
remain unchanged
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