Ray diagram of concave mirror object at F

Now we will draw ray diagram of concave mirror object at F with the help of rules for making ray diagram which we have discussed earlier.

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 a concave mirror

Place the object in the given position

 Now we place the object (↑) at focus point F.

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 a certain angle (incident ray goes away from the principal axis)

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

The second incident ray passes through point C after reflection.

After reflection, both the reflected rays go parallel to each other and it seems that they meet at infinity, so the image is formed at infinity.

 

Position of image	At infinity
Nature of image	Real and inverted
Size of image	larger than object(Highly enlarged)

 

For this position of the object, watch the video from 27.30min.

(Explained in Hindi and English languages)

Related Topics

1. Object beyond C

2. Object at C

3. Object at infinity

4. Object between C and F

5. Object between F and P

Image formation by convex mirror

1. Object between infinity and mirror

2. Object at infinity