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11
MCQ (Single Correct Answer)

There are certain material developed in laboratories which have a negative refractive index figure. A ray incident from air (Medium 1) into such a medium (Medium 2) shall follow a path given by

A
B
C
D
12
MCQ (Multiple Correct Answer)

Consider an extended object immersed in water contained in a plane trough. When seen from close to the edge of the trough the object looks distorted because

A
the apparent depth of the points close to the edge are nearer the surface of the water compared to the points away from the edge
B
the angle subtended by the image of the object at the eye is smaller than the actual angle subtended by the object in air
C
some of the points of the object far away from the edge may not be visible because of total internal reflection
D
water in a trough acts as a lens and magnifies the object
13
MCQ (Multiple Correct Answer)

A rectangular block of glass $A B C D$ has a refractive index 1.6. A pin is placed midway on the face $A B$ figure. When observed from the face $A D$, the pin shall

A
appear to be near $A$
B
appear to be near $D$
C
appear to be at the centre of $A D$
D
not be seen at all
14
MCQ (Multiple Correct Answer)

Between the primary and secondary rainbows, there is a dark band known as Alexandar's dark band. This is because

A
light scattered into this region interfere destructively
B
there is no light scattered into this region
C
light is absorbed in this region
D
angle made at the eye by the scattered rays with respect to the incident light of the sun lies between approximately $42^{\circ}$ and $50^{\circ}$
15
MCQ (Multiple Correct Answer)

A magnifying glass is used, as the object to be viewed can be brought closer to the eye than the normal near point. This results in

A
a larger angle to be subtended by the object at the eye and hence, viewed in greater detail
B
the formation of a virtual erect image
C
increase in the field of view
D
infinite magnification at the near point
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