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10
MCQ (Single Correct Answer)

A car is moving with at a constant speed of $60 \mathrm{~km} \mathrm{~h}^{-1}$ on a straight road. Looking at the rear view mirror, the driver finds that the car following him is at a distance of 100 m and is approaching with a speed of $5 \mathrm{kmh}^{-1}$.

In order to keep track of the car in the rear, the driver begins to glance alternatively at the rear and side mirror of his car after every 2 s till the other car overtakes. If the two cars were maintaining their speeds, which of the following statement $(\mathrm{s})$ is/are correct?

A
The speed of the car in the rear is $65 \mathrm{~km} \mathrm{~h}^{-1}$
B
In the side mirror, the car in the rear would appear to approach with a speed of $5 \mathrm{kmh}^{-1}$ to the driver of the leading car
C
In the rear view mirror, the speed of the approaching car would appear to decrease as the distance between the cars decreases
D
In the side mirror, the speed of the approaching car would appear to increase as the distance between the cars decreases
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 $50^{\circ}$
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