1
NEET 2016 Phase 2
+4
-1
A linear aperture whose width is 0.02 cm is placed immediately in front of a lens of focal length 60 cm. The aparture is illuminated normally by a parallel beam of wavelength 5 $$\times$$ 10$$-$$5 cm. The distance of the first dark band of the diffraction pattern from the centre of the screen is
A
0.10 cm
B
0.25 cm
C
0.20 cm
D
0.15 cm
2
NEET 2016 Phase 2
+4
-1
A person can see clearly objects only when they lie between 50 cm and 400 cm from his eyes . In order to increase the maximum distance of distinct vision to infinity, the type and power of the correcting lens, the person has to use. will be
A
convex, + 2.25 diopter
B
concave, $$-$$0.25 diopter
C
concave, $$-$$0.2 diopter
D
convex, + 0.15 diopter
3
NEET 2016 Phase 1
+4
-1
Match the corresponding entries of column 1 with column 2. [Where m is the magnification produced by the mirror]

Column 1 Column 2
(A) m = - 2 (p) Convex mirror
(B) m = -$${1 \over 2}$$ (q) Concave mirror
(C) m = +2 (r) Real image
(D) m = +$${1 \over 2}$$ (s) Virtual image
A
A  $$\to$$  p   and   s;   B $$\to$$ q and r;   C $$\to$$ q and s;   D $$\to$$ q and r
B
A  $$\to$$  r   and   s;   B $$\to$$ q and s;   C $$\to$$ q and r;   D $$\to$$ p and s
C
A  $$\to$$  q  and  r;   B $$\to$$ q and r;   C $$\to$$ q and s;   D $$\to$$ p and s
D
A  $$\to$$  p   and   r;   B $$\to$$ p and s;   C $$\to$$ p and q;   D $$\to$$ r and s
4
NEET 2016 Phase 1
+4
-1
In a diffraction pattern due to a single slit of width $$a$$, the first minimum is observed at an angle 30o when light of wavelength 5000 $$\mathop A\limits^ \circ$$ is incident on the slit. The first secondary maximum is observed at an angle of
A
sin$$-$$1$$\left( {{1 \over 2}} \right)$$
B
$${\sin ^{ - 1}}\left( {{3 \over 4}} \right)$$
C
$${\sin ^{ - 1}}\left( {{1 \over 4}} \right)$$
D
$${\sin ^{ - 1}}\left( {{2 \over 3}} \right)$$
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Mechanics
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Optics
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