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प्रश्न
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उत्तर
The parallel beam of light on reflection by a concave mirror converges at a point on the principal axis, midway between pole and the centre of curvature. This point is called the principal focus
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संबंधित प्रश्न
Explain the following term :
Plane mirror
Draw diagram/diagrams to show them.
An insect is sitting in front of a plane mirror at a distance 1 m from it.
(a) Where is the image of the insect formed?
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. Write an expression for the number of images formed of an object placed in between the mirrors. State the condition, if any.
Two plane mirrors are arranged parallel and facing each other at some separation. How many images are formed for a point object kept in between them? Show the formation of images with the help of a ray diagram
Two plane mirrors are placed making an angle 60° in between them. For an object placed in between the mirrors, the number of images formed will be :
A ray of light strikes a plane mirror, such that the angle with the mirror is 20°. What is the value of angle of reflection? What is the angle between the incident ray and the reflected ray?
Prove geometrically that when plane mirror turns through a certain angle, the reflected ray turns through twice the angle.
State the mirror formula for the formation of total number of images formed in two plane mirrors, held at an angle.
Draw a neat two ray diagram for the formation of images in two plane mirrors, when mirrors are at right angles to each other.
