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प्रश्न
Radius of curvature of a spherical mirror is ............. its focal length.
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उत्तर
Radius of curvature of a spherical mirror is two times its focal length
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संबंधित प्रश्न
It is desired to obtain an erect image of an object, using concave mirror of focal length of 12 cm.
What should be the range of distance of an object placed in front of the mirror?
A student wants to project the image of a candle flame on the walls of the school laboratory by using a mirror.
(a) Which type of mirror should he use and why?
(b) At what distance, in terms of focal length 'f' of the mirror, should he place the candle flame to get the magnified image on the wall?
(c) Draw a ray diagram to show the formation of the image in this case.
(d) Can he use this mirror to project a diminished image of the candle flame on the same wall? State 'how' if your answer is 'yes' and 'why not' if your answer is 'no.'
Name the mirror that can give an erect and enlarged image of an object.
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?
Three students A, B and C focussed a distant building on a screen with the help of a concave mirror. To determine focal length of the concave mirror they measured the distances as given below:
Student A : From mirror to the screen
Student B : From building to the screen
Student C : From building to the mirror
Who measured the focal length correctly ;
(a) Only A
(b) Only B
(c) A and B
(d) B and C
If an object is at infinity (very large distance) in front of a concave mirror, where is the image formed?
Draw the following diagram in your answer book and show the formation of image of the object AB with the help of suitable rays:
The real image formed by a concave mirror is smaller than the object if the object is:
(a) between centre of curvature and focus
(b) at a distance greater than radius of curvature
(c) at a distance equal to radius of curvature
(d) at a distance equal to focal length
Name the mirror which can give:
an erect and enlarged image of an object.
Which of the following are concave mirrors and which convex mirrors?
