How To Draw Images Of Concave Lens

Concave Lens - Ray diagram

Concluding updated at Apr 26, 2020 past

For a Concave lens,

There are only 2 cases

They are

• Object is Placed at Infinity
• Object is Placed betwixt Infinity and Optical Middle

Case ane - Object is Placed at infinity

In this Case, Object is kept far away from mirror (well-nigh at infinite distance)

So, nosotros draw rays parallel to principal centrality

Since ray parallel to main axis announced to pass through the Focus

All rays announced to meet at focus after refraction

Hence, Image is formed at Focus

And it is on the left side of the lens. So, Image is virtual

And it is very very small

We can say that

• Image is virtual (left side of the lens)
• Epitome is Erect
• Epitome is Smaller than the Object (Highly Macerated)

Example 2 - Object is between Infinity and Optical Center

Here, Object AB kept anywhere on the main centrality - between Infinity and Optical Center (O)

Starting time, we draw a ray parallel to principal axis

So, it appears to pass through focus after reflection

We draw another ray which passes through Optical Center

So, the ray volition go through without any difference

Where both reflected rays meet is betoken A'

And the image formed is A'B'

This image is formed between F _i and Optical Centre (O)

Nosotros tin can say that

• Image is behind the Mirror (Real Image)
• Image is Erect
• Image is Smaller than the Object (Diminished)

To summarise

Position of the object	Position of the paradigm	Relative size of the epitome	Nature of the image
At infinity	At focus F one	Highly diminished, Point - Sized	Virtual and erect
Betwixt infinity and optical eye O of the lens	Betwixt focus F i and optical centre O	Macerated	Virtual and erect

Source: https://www.teachoo.com/10839/3118/Concave-Lens---Ray-diagram/category/Concepts/

Posted by: bigelowcrongety.blogspot.com

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