Advertisements
Advertisements
प्रश्न
In order to obtain a magnification of, –0.75 with a convex lens of focal length 8 cm, the object should be placed:
(a) at less than 8 cm
(b) between 8 cm and 16 cm
(c) beyond 16 cm
(d) at 16 cma
उत्तर
Beyond 16 cm
For an object placed beyond 2f of a convex lens, the image formed is real, inverted and smaller than the object.
APPEARS IN
संबंधित प्रश्न
What is the magnification of the images formed by plane mirrors and why?
What is the nature of image formed by a concave mirror if the magnification produced by the mirror
−2?
Fill in the following blank with suitable word:
If the magnification has a minus sign, than the image is ......... and .......
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.
A lens of focal length 12 cm forms an erect image three times the size of the object. The distance between the object and image is ______.
What is the nature of the image formed by a convex lens if the magnification produced by the lens is, – 0.5?
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?
The filament of a lamp is 80 cm from a screen and a converging lens forms an image of it on a screen, magnified three times. Find the distance of the lens from the filament and the focal length of the lens.
An object is 0.09 m from a magnifying lens and the image is formed 36 cm from the lens. The magnification produced is:
(a) 0.4
(b) 1.4
(c) 4.0
(d) 4.5
What do you mean by linear magnification?