1
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
A convex lens and a concave lens, each having same focal length of 25 cm, are put in contact to form a combination of lenses. The power in diopters of the combination is
A
zero
B
25
C
50
D
infinite.
2
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
3
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.
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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