What are the rules for convex lens?
What are the rules for convex lens?
Rules for obtaining images formed by convex lens Rule 1: A ray of light which is originally parallel to the principal axis passes through the focus after refraction through the lens. Rule 2: A ray of light passing through the optical centre of the convex lens does not bent after refraction but goes straight.
What are the rules of image formation by convex lens?
Summary of Image Formation by Concave and Convex Lens
| Image formation by Convex Lens | ||
|---|---|---|
| Object location | Image location | Image nature |
| At F1 | At infinity | Real and Inverted |
| At 2 F1 | At 2F2 | Real and Inverted |
| Between F1 and 0 | On the same side as the object | Virtual and Erect |
What are the rules used for drawing ray diagrams for the formation of image by convex lens?
Rules used for drawing ray diagrams for the formation of an image by a convex lens : (1) When the incident ray is parallel to the principal axis, the refracted ray passes through the principal focus. (2) When the incident ray passes through the principal focus , the refracted ray is parallel to the principal axis.
What are the three rules for refraction in a convex lens?
Rules for drawing Ray Diagram in Lenses
- Rule 1 – Ray parallel to principal axis will pass through focus. For a convex lens ,
- Rule 2 – Ray passing through focus will become parallel to principal axis. For a convex lens,
- Rule 3 – Ray passing through Optical Center will emerge without deviation.
What is the principal focus of convex lens?
A principle focus of a convex lens is defined as the point on the principal axis on which the light rays coming parallel to the principal axis converge after getting refracted from the convex lens.
What is convex lens diagram?
Convex lenses Parallel light rays that enter the lens converge . They come together at a point called the principal focus . In a ray diagram, a convex lens is drawn as a vertical line with outward facing arrows to indicate the shape of the lens.
How many diagrams does a convex lens have?
To summarise
| Position of the object | Position of the image | Nature of the image |
|---|---|---|
| At 2F 1 | At 2F 2 | Real and inverted |
| Between F 1 and 2F 1 | Beyond 2F 2 | Real and inverted |
| At focus F 1 | At infinity | Real and inverted |
| Between focus F 1 and optical Center O | On the same side of the lens as the object | Virtual and erect |
How do you draw a ray diagram for a convex lens?
1. Pick a point on the top of the object and draw three incident rays traveling towards the lens. Using a straight edge, accurately draw one ray so that it passes exactly through the focal point on the way to the lens. Draw the second ray such that it travels exactly parallel to the principal axis.
What are the rules to draw ray diagrams?
Pick a point on the top of the object and draw two incident rays traveling towards the mirror. Using a straight edge, accurately draw one ray so that it passes exactly through the focal point on the way to the mirror. Draw the second ray such that it travels exactly parallel to the principal axis.
What is the principal focus of a convex lens?
How many focus does a convex lens have?
Since a convex lens has two principal foci, so it has two focal lengths, known as first focal length (f1) and the second focal length (f2). (i) First Focal length : The distance of the first principal focus of the lens from the optical centre ‘O’ of the lens is called first focal length of convex lens.
