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प्रश्न
An object is placed at a distance of 12 cm in front of a concave mirror of radius of curvature 30 cm. List four characteristics of the image formed by the mirror.
उत्तर
Here, radius of curvature (R) of concave mirror is given 30 cm.
Therefore, focal length of the mirror,
`f =R/2= 30/2 = 15` cm
Also, it is given that object is placed at a distance of 12 cm in front of a concave mirror . Hence, it is apparent that object is placed between the focus and pole of the mirror.
Therefore, four properties of the image formed by the given concave mirror of the object placed between focus and pole of the mirror are:
(i) Image is always erect
(ii) Big in size
(iii) Virtual
(iv) Always forms behind the mirror.
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संबंधित प्रश्न
"A concave mirror of focal length 15 cm can form a magnified, erect as well as inverted image of an object placed in front of it." Justify this statement stating the position of the object with respect to the pole of the mirror in both the cases for obtaining the images.
Draw the following diagram in which a ray of light is incident on a concave/convex mirror on your answer sheet. Show the path of this ray, after reflection, in each case.
List four specific characteristics of the images of the objects formed by convex mirrors.
The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?
If the focal length of a convex mirror is 25 cm, what is its radius of curvature?
Make labelled ray diagrams to illustrate the formation of:
a real image by a converging mirror.
When an object is placed at a distance of 15 cm from a concave mirror, its image is formed at 10 cm in front of the mirror. Calculate the focal length of the mirror.
A real image of an object is to be obtained. The mirror required for this purpose is:
(a) convex
(b) concave
(c) plane
(d) either convex or concave
In the following diagram. MM' is a concave mirror and AB is an object. Draw on your answer-sheet a ray diagram to show the formation of image of this object.
A student obtained a sharp inverted image of a distant tree on a screen placed in front of the concave mirror. He then removed the screen and tried to look into the mirror. He would now see
(A) a very blurred image on the wall opposite to the mirror
(B) an erect and magnified image of the tree in the mirror
(C) no image as the screen has been removed
(D) a highly diminished inverted image of the tree at the focus of the mirror.
