Advertisements
Advertisements
प्रश्न
Give two circumstances in which a concave mirror can form a magnified image of an object placed in front of it. Illustrate your answer by drawing labelled ray diagrams for both.
उत्तर
The two circumstances in which a concave mirror can form a magnified image of an object that is placed in front of it are:
- When an object is placed between the pole and the focus of a concave mirror, the image formed is virtual, erect and magnified, as shown in the figure. Here, the object AB is placed between the pole and the focus of a concave mirror. Its image A'B' is formed behind the
mirror and is virtual, erect and magnified.
- When an object is placed between the centre of curvature and the focus of a concave mirror, the image formed is real, inverted and enlarged, as shown in figure 2. Here, the object AB is placed between the centre of curvature and the focus of a concave mirror. Its image A'B' is formed beyond the centre of curvature and is real, inverted and enlarged.
APPEARS IN
संबंधित प्रश्न
Where should an object be placed in front of the concave mirror so as to obtain its virtual, erect and magnified image?
Which one of these circumstances enables a concave mirror to be used as a shaving mirror?
What sign (+ve or −ve) has been given to the following on the basis of Cartesian Sigh Convention?
Height of a real image.
What is the nature of image formed by a concave mirror if the magnification produced by the mirror
+4
Write down a formula for the magnification produced by a concave mirror.
in terms of object distance and image distance
An object 20 cm from a spherical mirror gives rise to virtual image 15 cm behind the mirror. Determine the magnification of the image and the type of mirror used.
At what distance from a converging lens of focal length 12 cm must an object be placed in order that an image of magnification 1 will be produced?
At what distance should an object be placed from a convex lens of focal length 18 cm to obtain an image at 24 cm from it on the other side? What will be the magnification produced in this case?
To obtain a magnification of, –0.5 with a convex lens, the object should be placed:
(a) at F
(b) between optical centre and F
(c) between F and 2F
(d) beyond 2F
What is meant by magnification? Write its expression. What is its sign for real image and virtual image?
