Advertisements
Advertisements
प्रश्न
Two plane mirrors are placed making an angle θ in between them. Write an expression for the number of images formed of an object placed in between the mirrors. State the condition, if any.
Advertisements
उत्तर
If two mirrors make an angle with each other and object is placed in between the two mirrors, the number of images formed is n or (n - 1) depending upon n = 360o / o is odd or even.
(a) If n = 360o / o is odd,
(i) The number of images formed is n, when the object is placed asymmetrically between the mirrors.
(ii) The number of images formed is n-1, when the object is placed symmetrically between the mirrors.
(b) If n = 360o / o is even, the number of images is always n-1.
APPEARS IN
संबंधित प्रश्न
Write true or false of the following statement.
When a light ray is reflected from a wall, the angle of incidence is not equal to the angle of reflection.
A man standing in front of a plane mirror finds his image at a distance 6 metre from himself. What is the distance of man from the mirror?
An insect is sitting in front of a plane mirror at a distance 1 m from it.
(b) What is the distance between the insect and its image?
Two plane mirrors are placed making an angle θ° in between them. For an object placed in between the mirrors, if angle is gradually increased from 0° to 180°, how will the number of images change : increase, decrease or remain unchanged?
In the barber's shop, two plane mirrors are placed :
Draw a neat two ray diagram for the formation of images in two plane mirrors, when mirrors are at right angles to each other.
What should be the minimum size of a plane mirror, so that a person 182 cm high can see himself completely?
