Advertisements
Advertisements
प्रश्न
A dentist's mirror has a radius of curvature of 3 cm. How far must it be placed from a small dental cavity to give a virtual image of the cavity that is magnified five times?
उत्तर
APPEARS IN
संबंधित प्रश्न
A student has obtained an image of a well-illuminated distant object on a screen to determine the focal length, F1of the given spherical mirror. The teacher then gave him another mirror of focal length, F2 and asked him to obtain a focused image of the same object on the same screen. The student found that in order to focus the same object using the second mirror, he has to move the mirror away from the screen. From this observation, it may be concluded that both the spherical mirrors given to the student were (select the correct option)
(A) Concave and F1 < F2
(B) Concave and F1 > F2
(C) Convex and F1 < F2
(D) Convex and F1 > F2
Where should an object be placed in front of the concave mirror so as to obtain its virtual, erect and magnified image?
A virtual, erect and magnified image of an object is to be produced with a concave mirror of focal length 12 cm. Which of the following object distance should be chosen for this purpose?
(i) 10 cm
(ii) 15 cm
(iii) 20 cm
Give reason for your choi
Define linear magnification produced by a mirror.
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 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?
A lens of focal length 20 cm is used to produce a ten times magnified image of a film slide on a screen. How far must the slide be placed from the lens?
For a plane mirror, magnification m = ______.
Magnification for the convex mirror is ______.
