WorksheetsIllumination
Total questions: 12
Worksheet time: 8mins
The relation among U , V and F for spherical mirror is ?
f = uv/(u+v)
v = fu/(u+f)
u = fv/(f+v)
All of these
An object at a distance of + 15 cm is slowly moved towards the pole of a convex mirror. The image will get
shortened and real
enlarged and real
enlarge and virtual
diminished and virtual
A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by
15
20
30
0
What should be the minimum height of a plane mirror, so that a 6 ft tall man can see his full image standing in front of the mirrror ?
6 ft
12 ft
3 ft
2 ft
The correct relation between u, v and r for a mirror will be
R = 2uv/(u+v)
R = uv/2(u-v)
R = 1/(u+v)
1/R = 1/u + 1/v
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An object is placed at 100 mm in front of a concave mirror which produces an upright image (erect image). The radius of curvature of the mirror is:
More than 200 mm
Less than 200 mm
More than 100 mm
Less than 100 mm
In torches, search lights and headlights ,the bulb is placed :-
between the pole and the focus of the reflector
Very near to the focus of the reflector
Between the focus and centre of curvature of the reflector
At the centre of curvature of the reflector
A child is standing in front of a magic mirror . He finds the image of his head bigger , the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations from the magic mirror to the top
Plane, convex and concave
Convex, concave and plane
Concave, plane and convex
Convex, plane and concave
What is the condition for the magnification of a convex mirror
Is +ve and less than 1
Is -ve and greater than 1
Is +ve and greater than 1
Is -ve and less than 1
What is the minimum distance between an object and its real image in case of a concave mirror when the object is at C?
f
2f
4f
Zero
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