# What are the rules for image formation in concave mirror?

## What are the rules for image formation in concave mirror?

Rules for Obtaining Images Formed by a Concave Mirror

• A ray coming parallel to the principal axis is reflected through the principal focus of the concave mirror.
• The ray of light passing the principal focus becomes parallel to the principal axis after being reflected from the mirror.

## What are the rules of concave mirror?

They are: Any incident ray traveling parallel to the principal axis on the way to the mirror will pass through the focal point upon reflection. Any incident ray passing through the focal point on the way to the mirror will travel parallel to the principal axis upon reflection.

What are the rules for image formation in concave and convex mirror?

Only a concave mirror is capable of creating a real image and this only occurs if the object is situated at a greater distance than the focal length of the mirror’s surface. The image formed in a convex mirror is always virtual and erect, whatever be the position of the object.

What are the rules for formation of image?

General rules for image formation using ray diagrams:

• Any ray of light that passes through the mirror, is always parallel to the principal axis.
• Any ray of light that passes through the mirror always passes through the principal focus (f) of the mirror after reflection.

### What are the rules in the image formation of convex mirror?

For a convex mirror, if the object is at infinity the image will be a dot on the focal point. As the object moves from infinity toward the mirror, the image moves along the principal axis toward the mirror. When the object is right next to the mirror, the image will be right next to the mirror on the other side.

### How many rules are there in formation of image?

Rules for Formation of Image by Spherical Mirrors Rule 2 :- When are a lot of light passes through focused and it becomes parallel to principal Axis after reflection from mirror. Rule 3 :- When a Ray of Light passes through centre of curvature it retraces to some path after reflection .

What are the rules to form image of an object by concave lens?

Rules for obtaining images formed by concave lens Rule 1: A ray of light parallel to the principal axis of the concave lens appears to be coming from focus after refraction through the lens. Rule 2: A ray of light passing through the optical centre of the concave lens goes straight after refraction through the lens.

How many rules does a convex mirror have?

Once these incident rays strike the mirror, reflect them according to the two rules of reflection for convex mirrors. The ray that travels towards the focal point will reflect and travel parallel to the principal axis. Use a straight edge to accurately draw its path.

#### What are the rules for image formation?

What are the rules to form image of an object by a concave lens from the images of an object when it is moved from infinity to lens?

Virtual, inverted and diminished.

What is a concave mirror ray diagram?

Concave Mirror Ray Diagram lets us understand that, when an object is placed at infinity, a real image is formed at the focus. The size of the image is much smaller compared to that of the object. When an object is placed behind the center of curvature, a real image is formed between the center of curvature and focus.

## What is the summary of concave mirror image formation?

The summary of concave mirror image formation is given below: Object Placement Position of Image Image Size At infinity At the focus F Highly Diminished Beyond the center of curvature C Between F and C Diminished At the center of curvature C At C Same Size Between C and F Beyond C Enlarged

## How to find the position of the image formed by a mirror?

The intersection of these two rays after reflection gives the position of the image of the object. For a concave mirror any of the following four ray diagrams can be used for locating the image formed: a) A ray parallel to the principal axis, after reflection, will pass through the principal focus of a concave mirror.

When do rays of a concave mirror meet at infinity?

For a Concave mirror, object can be kept at different positions In this Case, Object AB is kept far away from mirror (almost at infinite distance) Hence we can say that they meet at infinity. We see that the rays form an image behind the mirror. Question 3 Page 168 – Name a mirror that can give an erect and enlarged image of an object