Advertisements
Advertisements
प्रश्न
Define the terms pole, principal axis and centre of curvature with reference to a spherical mirror.
Advertisements
उत्तर
Pole: The geometric centre of the spherical surface of mirror is called the pole of mirror.
Principal axis: It is the straight line joining the pole of the mirror to its centre of curvature.
Centre of curvature: The centre of curvature of a mirror is the centre of the sphere of which the mirror is a part.
APPEARS IN
संबंधित प्रश्न
Define Radius of curvature of the spherical mirror
What type of mirror can be used to obtain a real image of an object?
When an object of height 1 cm is kept at a distance 4 cm from a concave mirror, its erect image of height 1.5 cm is formed at a distance 6 cm behind the mirror. Find the focal length of mirror, by drawing.
Define linear magnification produced by a mirror?
The boxes in figure (a, b, c) represent mirrors; insert a mirror which will reflect the incident ray as shown in the diagram.
Numerical problem.
The radius of curvature of a spherical mirror is 25 cm. Find its focal length.
Assertion: Incident ray is directed towards the centre of curvature of spherical mirror. After reflection it retraces its path.
Reason: Angle of incidence (i) = Angle of reflection (r) = 0°
Size of image of an object by a mirror having a focal length of 20 cm is observed to be reduced to 1/3rd of its size. At what distance the object has been placed from the mirror? What is the nature of the image and the mirror?
In the figure shown, the image of a real object is formed at the point I. AB is the principal axis of the mirror. The mirror must be:
