1
JEE Advanced 2014 Paper 1 Offline
MCQ (More than One Correct Answer)
+3
-0

A transparent thin film of uniform thickness and refractive index n1 = 1.4 is coated on the convex spherical surface of radius R at one end of a long solid glass cylinder of refractive index n2 = 1.5, as shown in the figure. Rays of light parallel to the axis of the cylinder traversing through the film from air to glass get focused at distance f1 from the film, while rays of light traversing from glass to air get focused at distance f2 from the film. Then
A
$$\left| {{f_1}} \right| = 3R$$
B
$$\left| {{f_1}} \right| = 2.8R$$
C
$$\left| {{f_2}} \right| = 2R$$
D
$$\left| {{f_2}} \right| = 1.4R$$
2
IIT-JEE 2010 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2

A ray OP of monochromatic light is incident on the face AB of prism ABCD near vertex B at an incident angle of 60$$^\circ$$ (see figure). If the refractive index of the material of the prism is $$\sqrt3$$, which of the following is(are) correct?

A
The ray gets totally internally reflected at face CD.
B
The ray comes out through face AD.
C
The angle between the incident ray and the emergent ray is 90$$^\circ$$.
D
The angle between the incident ray and the emergent ray is 120$$^\circ$$.
3
IIT-JEE 2009 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2

A student performed the experiment of determination of focal length of a concave mirror by $$u$$-$$v$$ method using an optical bench of length 1.5 m. The focal length of the mirror used is 24 cm. The maximum error in the location of the image can be 0.2 cm. The 5 sets of ($$u,v$$) values recorded by the student (in cm) are : (42, 56), (48, 48), (60, 40), (66, 33), (78, 39). The data set(s) that cannot come from experiment and is (are) incorrectly recorded, is (are)

A
(42, 56)
B
(48, 48)
C
(66, 33)
D
(78, 39)
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