Advertisements
Advertisements
प्रश्न
What is the relationship between the focal length and radius of curvature?
Advertisements
उत्तर
The relationship between the focal length, f, and radius of curvature, r is
f = 1/2 x r.
APPEARS IN
संबंधित प्रश्न
Define the following term in the context of spherical mirrors:- Centre of curvature
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. |
Give one use each of a concave and a convex mirror.
Define the Focal length of a spherical mirror
A diverging lens is used in ______.
An object 5 cm high forms a virtual image of 1.25 cm high, when placed in front of a convex mirror at a distance of 24 cm. Calculate:
- the position of the image
- the focal length of the convex mirror.
AB is the object, A'B' is the image, and MM' is the position of the mirror. Complete the ray diagram showing the formation of the image and find the focal length of the mirror.
An object 10 cm high is placed at a distance of 20 cm in front of a spherical mirror of focal length 25 cm. By scale drawing find the nature, position, and magnification of the image in the following case:
Concave mirror
Name the type of mirror used in the following situation:
Solar furnace
Support your answer with reason.
