Advertisements
Advertisements
प्रश्न
A .............. mirror is obtained on silvering the outer surface of a part of a hollow glass sphere.
Advertisements
उत्तर
A concave mirror is obtained on silvering the outer surface of a part of a hollow glass sphere.
APPEARS IN
संबंधित प्रश्न
Describe with a suitable diagram, how a convex mirror diverges a parallel beam of light rays. Mark clearly the pole, focus and centre of curvature of concave mirror in this diagram.
Which type of mirror has:
positive focal length?
State whether the following statement is true or false:
A diverging mirror is used as a rear-view mirror.
Where would the image be formed by a convex mirror if the object is placed:
between infinity and pole of the mirror?
Draw labelled ray-diagrams to show the formation of image in both the case.
Whatever be the position of the object, the image formed by a mirror is virtual, erect and smaller than the object. The mirror then must be:
(a) plane
(b) concave
(c) convex
(d) either concave or convex
A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The special mirror is made up of three types of mirrors in the following order from top downwards:
(a) Convex, Plane, Concave
(b) Plane, Convex, Concave
(c) Concave, Plane, Convex
(d) Convex, Concave, Plane
Write true or false
The focal length of a convex mirror is equal to its radius of curvature.
Numerical problem.
A concave mirror produces three times magnified real image of an object placed at 7 cm in front of it. Where is the image located? (Ans: 21 cm in front of the mirror)
A convex rearview mirror is preferred over a plane mirror in a car. Why?
If the object is at infinity in front of a convex mirror the image is formed at infinity.
