1
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
For a parallel beam of monochromatic light of wavelength '$$\lambda $$' , diffraction is produced by a single slit whose width 'a' is of the order of the wavelength of the light. If 'D' is the distance of the screen from the slit, the wifth of the central maxima will be
A
$${{Da} \over \lambda }$$
B
$${{2Da} \over \lambda }$$
C
$${{2D\lambda } \over a}$$
D
$${{D\lambda } \over a}$$
2
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Two identical thin plano-convex glass lenses (refractive index 1.5) each having radius of curvature of 20 cm are placed with their convex surfaces in contact at the centre. The intervening space is filled with oil of refractive index 1.7. The focal length of the combination is
A
$$-$$ 50 cm
B
50 cm
C
$$-$$ 20 cm
D
$$-$$ 25 cm
3
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
In a double slit experiment, the two slits are 1 mm apart and the screen is placed 1 m away. A monochromatic light of wavelength 500 nm is used. What will be the width of each slit for obtaining ten maxima of double slit within the central maxima of single slit pattern ?
A
0.5 mm
B
0.02 mm
C
0.2 mm
D
0.1 mm
4
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
The refracting angle of a prism is A, and refractive index of the material of the prism is cot (A/2). The angle of minimum deviation is
A
90o $$-$$ A
B
180o + 2A
C
180o $$-$$ 3A
D
180o $$-$$ 2A
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