The natural source of light is
Sun
Electric lamp
Candle flame
Kerosene lamp
Radius of curvature, r =
f/2
2f
2/3 f
f
A lunar eclipse occurs
on a new-moon night
on a full-moon night
when the moon is waxing
on any night
Concave mirror is used in
Solar devices
Car headlights
Dentist's mirror
All of these
Water is
transparent
translucent
opaque
polymer
Which of the following is used in the rear-view mirrors of vehicles ?
Plane mirror
Convex mirror
Concave lens
Any of these
White light is made of
1 colour
3 colours
5 colours
7 colours
Sunlight on earth is
convergent
divergent
parallel
irregular
In a concave mirror object is beyond c then the image formed is at
F
Beyond C
At C
Between F and C
Nature of the shadow depends on
the relative distance between the source of light and the object
the relative size of the source of light and the object
the angle between the source of light and the object
all of the above
