Advertisements
Advertisements
Question
When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper.
What name is given to the distance between spherical mirror and carbon paper?
Advertisements
Solution
The distance between the mirror and the carbon paper is the focal length.
APPEARS IN
RELATED QUESTIONS
Explain the following term related to spherical lenses:- principal axis
Explain the following term related to spherical lenses: focal length
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. |
When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper.
What is the advantage of using a carbon paper rather than a white paper?
Name the spherical mirror which can produce a virtual and diminished image of an object.
The shiny outer surface of a hollow sphere of aluminium of radius 50 cm is to be used as a mirror:
State whether this spherical mirror will diverge or converge light rays.
Explain the following terms :
Pole, Centre of curvature, Radius of curvature, Principal axis. Show them on separate diagrams for each of the concave and convex mirrors.
State the number of images of an object placed between two mirrors, formed in each case when mirrors are inclined to each other at (a) 90°, and (b) 60°.
In each case (a) and (b), draw reflected rays for the given incident rays and mark focus by the symbol F.
State the two convenient rays that are chosen to construct the image by a spherical mirror for a given object? Explain your answer with the help of suitable ray diagrams.
The focal length of a concave mirror is 10 cm. Find its radius of curvature.
Select the correct option:
Looking into a mirror one finds her image diminished, the mirror is:
What is the relationship between the focal length and radius of curvature?
In torches, search lights and headlights of vehicles the bulb is placed ______.
Spherical mirrors are one form of ______ mirrors.
The radius of curvature of a spherical mirror is 18 cm. What is the focal length of this mirror?
What is the difference between virtual images of an object formed by a concave mirror and a convex mirror?
What is the focal length (f) of a mirror?
