1
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
An air bubble in a glass slab with refractive index 1.5 (near normal incidence) is 5 cm deep when viewed from one surface and 3 cm deep when viewed from the opposite face. The thickness (in cm) of the slab is
A
8
B
10
C
12
D
16
2
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
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
3
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
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
4
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
Photons with energy 5 eV are incifent on a cathode C in a photoelectric cell. The maximum energy of emitted photoelectrons is 2 eV. When photons of energy 6 eV are incident on C, no photoelectrons will reach the anode A, if the stopping potential of A relative to C is
A
+ 3 V
B
+4 V
C
$$-$$1 V
D
$$-$$3 V
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