1
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
A ray of light is incident at an angle of incidence i, on one face of a prism of angle A (assumed to be small ) and emerges normally from the opposite face. If the refractive index of the prism is $$\mu $$. the angle of incidence i, is nearly equal to
A
$$\mu $$A
B
$${{\mu A} \over 2}$$
C
$${A \over \mu }$$
D
$${A \over {2\mu }}$$
2
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
A concave mirror of focal length $$f$$1 is placed at a distance of d from a convex lens of focal length $$f$$2. A beam of light coming from infinity and falling on this convex lens $$-$$ concave mirror combination returns to infinity. The distance d must equal
A
$${f_1} + {f_2}$$
B
$$-$$$${f_1} + {f_2}$$
C
2$${f_1} + {f_2}$$
D
$$-$$2$${f_1} + {f_2}$$
3
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
The magnifying power of a telescope is 9. When it is adjusted for parallel rays the distance between the objective and eyepiece is 20 cm. The focal length of lenses are
A
10 cm, 10 cm
B
15 cm, 5 cm
C
18 cm, 2 cm
D
11 cm, 9 cm
4
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a photosensitive material. The stopping potential is measured to be 3.57 V. The threshold frequency of the material is
A
4 $$ \times $$ 1015 Hz
B
5 $$ \times $$ 1015 Hz
C
1.6 $$ \times $$ 1015 Hz
D
2.5 $$ \times $$ 1015 Hz
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