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प्रश्न
A student wants to project the image of a candle flame on a screen 90 cm in front of a mirror by keeping the flame at a distance of 15 cm from its pole.
(a) Suggest the type of mirror he should use.
(b) Determine the linear magnification in this case.
(c) Find the distance between the object and its image.
(d) Draw ray diagram to show the image formation in this case
उत्तर
(a) Concave mirror
(b) Linear magnification of a concave mirror is given by :-
`m="-v"/"u"`
`=(-(-90))/((-15))`
= -6
(c) The distance between the object and image = 90 – 15 = 75 cm.
(d) Ray diagram:-
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संबंधित प्रश्न
Which one of these circumstances enables a concave mirror to be used as a shaving mirror?
What is the nature of image formed by a concave mirror if the magnification produced by the mirror
+4
Define linear magnification produced by a mirror.
Write down a formula for the magnification produced by a concave mirror.
in terms of object distance and image distance
When an object is placed 20 cm from a concave mirror, a real image magnified three times is formed. Find:
(a) the focal length of the mirror.
(b) Where must the object be placed to give a virtual images three times the height of the object?
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 small object is so placed in front of a convex lens of 5 cm focal length that a virtual image is formed at a distance of 25 cm. Find the magnification.
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
A negative sign in the value of magnification indicates that the image is ______.
