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प्रश्न
Define the following terms in the context of spherical mirrors :
(i) Pole
(ii) Centre of curvature
(iii) Radius of curvature
(iv) Principal axis
उत्तर
(i) Pole of a spherical mirror
The central point of the reflecting surface of a spherical mirror is termed as the pole. It lies on the mirror and is denoted by the letter (P).
(ii) Centre of curvature
The centre of curvature is the centre of a sphere from which the given spherical mirror (convex or concave) is obtained. It is denoted by the letter (C).
(iii) Radius of curvature
The distance between the centre of curvature and pole (PC) is known as the radius of curvature.
(iv) Principal axis
The imaginary straight line joining the pole (P) and the centre of curvature (C) is termed as the principal axis.
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संबंधित प्रश्न
One half of a convex lens of focal length 10 cm is covered with a black paper. Can such a lens produce an image of a complete object placed at a distance of 30 cm from the lens? Draw a ray diagram to justify your answer. A 4 cm tall object is placed perpendicular to its principal axis of a convex lens of focal length 20 cm. The distance of the object from the lens is 15 cm. Find the nature, position and the size of the image.
We can obtain a real, enlarged and inverted image by a concave mirror.
How is the focal length of a spherical mirror related to its radius
What is a spherical mirror?
For what position of object, the image formed by a concave mirror is magnified and erect?
Does the mirror mentioned in part (b) form real image for all locations of the object?
How is the focal length of a spherical mirror related to its radius of curvature?
(a) When a concave mirror is used as a shaving mirror, where is the person's face in relation to the focus of mirror?
(b) State three characteristics of the image seen in part (a).
Is real image always inverted?
