Advertisements
Advertisements
प्रश्न
(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).
Advertisements
उत्तर
(a) The person's face is between the pole and focus of the mirror.
(b) The image formed is erect, virtual and magnified.
APPEARS IN
संबंधित प्रश्न
Explain the following term related to spherical lenses:- principal focus
Match the items given in Column I with one or more items of Column II.
| Column I | Column II | ||
| (a) | A plane mirror | (i) | Used as a magnifying glass. |
| (b) | A convex mirror | (ii) | Can form image of objects spread over a large area. |
| (c) | A convex lens | (iii) | Used by dentists to see enlarged image of teeth. |
| (d) | A concave mirror | (iv) | The image is always inverted and magnified. |
| (e) | A concave lens | (v) | The image is erect and of the same size as the object. |
| (vi) | The image is erect and smaller in size than the object. |
What is the relation between the focal length and radius of curvature of a spherical mirror (concave mirror or convex mirror)?
State the two kinds of spherical mirror and distinguish them with the aid of proper diagrams.
Name the mirrors shown in Figure (a) and (b).
State whether the image in part (a) is real or virtual?
Answer the following question:
Distinguish between the convex mirror and the concave mirror.
The following Figure shows a concave mirror MM' on which a ray of light incident from a point P gets reflected to meet the principle axis at O.
(a) Find, by construction, the position of the centre of curvature of the concave mirror.
(b) Write down the value for the radius of curvature of the mirror.
(c) Calculate the focal length of the mirror.
(d ) Which relation is used in deducing the focal length from the radius of curvature?
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?
Name the two types of spherical mirrors.
