1
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
The angle of a prism is A. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence 2 A on the first surface returns back through the same path after suffering reflection at the silvered surface.

The refractive index $$\mu $$, of the prism is
A
2sinA
B
2cosA
C
$${1 \over 2}$$cosA
D
tanA
2
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
If the focal length of objective lens is increased then magnifying power of
A
microscope will increase but that of telescope decrease.
B
microscope and telescope both will increase.
C
microscope and telescope both will decrease.
D
microscope will decrease but that of telescope will increase.
3
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Two plane mirrors are inclined at 70o. A ray incident on one mirror at angle, $$\theta $$ after reflection falls on second mirror and is reflected from there parallel to first mirror. The value of $$\theta $$ is
A
45o
B
30o
C
55o
D
50o
4
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A plano convex lens fits exactly into a plano concave lens. Their plane surfaces are parallel to each other. If lenses are made of different materials of refractive indices $$\mu $$1 and $$\mu $$2 and R is the radius of curvature of the curved surface of the lenses, then the focal length of the combination is
A
$${R \over {\left( {{\mu _1} - {\mu _2}} \right)}}$$
B
$${{2R} \over {\left( {{\mu _2} - {\mu _1}} \right)}}$$
C
$${R \over {2\left( {{\mu _1} + {\mu _2}} \right)}}$$
D
$${R \over {2\left( {{\mu _1} - {\mu _2}} \right)}}$$
NEET Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
CBSE
Class 12