Advertisements
Advertisements
Question
In the figure is shown a concave mirror. A is a point on the principal axis. If an object O is kept at A, image is formed on A itself. Copy the diagram. Draw the image in the diagram. Is the image real or virtual?
Measure the distance PA and write it in the diagram. What is the distance PA called?
Mark a point B on the principal axis, at which, if a point source of light is kept, the rays travel parallel to principal axis after reflection from M. What is point B called?
Advertisements
Solution
As the object is placed at A and its image is also formed at A, so the object must be at the center of curvature (C).
PA is called the radius of curvature and on measuring PA = 4.8 cm. Point B marked on the principal axis is called the principal focus.
APPEARS IN
RELATED QUESTIONS
Write true or false of the following statement.
The image formed by a plane mirror is real
You are standing at a distance of 2 meters from a plane mirror.
What is the distance between you and your image?
Wirte down the letter C and I as seen in a plane mirror.
Why are infinite images not seen when two plane mirrors are facing each other?
Draw diagrams to show the difference between regular and irregular reflection.
Identify the following kind of beam of light.
Complete the path of incident ray in the following case.
What kind of surface reflects light?
Play with a mirror
Write your name with a sketch pen on a thin sheet of paper, polythene or glass. Read your name on the sheet while standing in front of a plane mirror. Now look at your image in the mirror.
