Advertisements
Advertisements
Question
The letter F is placed in front of a plane mirror:
What is the name of the phenomenon involved?
Advertisements
Solution
The phenomenon involved is lateral inversion.
APPEARS IN
RELATED QUESTIONS
A 4 cm tall object is placed on the principal axis of a convex lens. The distance of the object from the optical centre of the lens is 12 cm and its sharp image is formed at a distance of 24 cm from it on a screen on the other side of the lens. If the object is now moved a little away from the lens, in which way (towards the lens or away from the lens) will he have to move the screen to get a sharp image of the object on it again? How will the magnification of the image be affected?
Define the following term in the context of spherical mirrors:- Principal axis
A ray of light strikes a plane mirror at an angle of 40° to the mirror surface. What will be the angle of reflection?
A ray of light is incident normally on a plane mirror. What will be the
angle of reflection?
What kind of mirror is required for obtaining a virtual image of the same size as the object?
A ray of light travels from a denser medium to a rarer medium. How will it bend?
Draw suitable diagrams to illustrate the action of (i) concave mirror and (ii) convex mirror on a beam of light incident parallel to the principal axis.
In each case (a) and (b), draw reflected rays for the given incident rays and mark focus by the symbol F.

Discuss the position and nature of image formed by a convex mirror when an object is moved from infinity towards the pole of mirror.
The image formed by a convex mirror is
When an object of height 1 cm is kept at a distance 4 cm from a concave mirror, its erect image of height 1.5 cm is formed at a distance 6 cm behind the mirror. Find the focal length of mirror, by drawing.
Draw a ray diagram to show the formation of the image, when the object is placed between optical centre and principal focus of a convex lens.
State the signs and values of magnifications in the above mentioned case.
Define the term principal focus in case of convex mirror. Draw a convex mirror and show its principal focus and focal length clearly.
What do you understand by the term real image?
The boxes in figure (a, b, c) represent mirrors; insert a mirror which will reflect the incident ray as shown in the diagram.

In the following figure shows a concave mirror with its pole (P), focus (F) and centre of curvature (C). Draw a ray diagram to show the formation of the image of an object AB by the concave mirror.

Numerical problem.
The radius of curvature of a spherical mirror is 25 cm. Find its focal length.
In torches, search lights and headlights of vehicles the bulb is placed ______.
The minimum length of the mirror required to see the full image of the person is half ‘ of his height.
