Question

draw a ray diagram showing image formation by convex lens between (i) f and 2f,(ii)between optical centre and f​

Answer 1

Explanation:

your answers

1. CASE 4 - OBJECT IS BETWEEN F AND 2F

Here, Object AB is kept between F 1 and 2F 1

First, we draw a ray parallel to principal axis

So, it passes through focus after refraction

We draw another ray which passes through Optical Center

So, the ray will go through without any deviation

Where both refracted rays meet is point A'

And the image formed is A'B'

This image is formed between beyond 2F 2

We can say that

Image is Real

Image is Inverted

Image is larger than the object (Magnified)

###. see the diagram in attachment..#########

2. Case 6 - Object Is Between O And F

Here, Object AB is kept between O and F 1

First, we draw a ray parallel to principal axis

So, it passes through focus after refraction

We draw another ray which passes through Optical Center

So, the ray will go through without any deviation

We observe that both refracted rays are diverging

It means that they would have met at some point

Hence, we extend both rays behind the lens

We see that the rays form an image behind the lens (on the left side).

So, the image is virtual

And image formed would be larger than the object

We can say that

Image is virtual (behind the lens)

Image is erect

Image is larger than the object (Magnified)

###. see the diagram in attachment..####

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