1
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
The intensity at the maximum in a Young's double slit experiment is $$I$$0. Distance between two slits is d = 5$$\lambda $$, where $$\lambda $$ is the wavelength of light used in the expreriment. What will be the intensity in front of one of the slits on the screen placed at a distance D = 10d ?
A
$${3 \over 4}{I_0}$$
B
$${{{I_0}} \over 2}$$
C
I0
D
$${{{I_0}} \over 4}$$
2
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
The angle of incidence for a ray of light at a refracting surface of a prism is 45o. The angle of prism is 60o. If the ray suffers minimum deviation through the prism, the angle of minimum deviation and refractive index of the material of the prism respectively, are
A
$${45^o};\sqrt 2 $$
B
$${30^o};{1 \over {\sqrt 2 }}$$
C
$${45^o};{1 \over {\sqrt 2 }}$$
D
$${30^o};\sqrt 2 $$
3
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
A astronomical telescope has objective and eyepiece of focal lengths 40 cm and 4 cm respectively. To view an object 200 cm away from the objective, the lenses must be separated by a distance
A
50.0 cm
B
54.0 cm
C
37.3 cm
D
46.0 cm
4
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
When a metallic surface is illuminated with radiation of wavelength $$\lambda $$, the stopping potential is V. If the same surface is illuminated with radiation of wavelength 2 $$\lambda $$, the stopping potential is $${V \over 4}$$. The threshold wavelength for the metallic surface is
A
$${5 \over 2}\lambda $$
B
3$$\lambda $$
C
4$$\lambda $$
D
5$$\lambda $$
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