Ray diagram of concave mirror object between F and P

We have discussed 5 positions of image formation by a concave mirror. We are going to learn how to draw a ray diagram of a concave mirror object between F and P.

This position before the concave mirror is very important.

Image formation by concave mirror

 

Steps to draw to ray diagram

1.   Draw the diagram of a concave mirror

2.   Place the object at the given position

3.   Follow the rules for making a ray diagram

 

Draw the diagram of concave mirror

Place the object at the given position

 Now we place the object (↑) between focus point F and pole (P)

Rules for making ray diagram

A light ray from point ‘A’ of the object incident parallel to the principal axis on the concave mirror.

The second light ray from the same point (A) incidents on the mirror at certain angle at pole (P).

The parallel incident ray passes through the focus point (F) after reflection.

The second incident ray gets reflected at the same angle as of angle of incidence (here `\anglei=\angler`)

Both the reflected rays never meet with each other but when we extend the rays behind the mirror, they appear to meet on the principal axis.

The image formed is virtual and erect.

 

Position of image	Behind the mirror
Nature of image	Virtual and erect
Size of image	Enlarged

 

For the object between  F and P, watch the video from 15.15 min 

 

Related Topics

1. Object beyond C

2. Object at C

3. Object at infinity

4. Object between C and F

5. 

Image formation by convex mirror

1. Object between infinity and mirror

2. Object at infinity