Question 4(iii)(a) An object is placed at 2F position of a convex lens. Draw a ray diagram showing the formation of the image.(b) How will the size of the image change if we, ONLY replace the lens in the above arrangement with another lens of a greater focal length?

Question

Accepted Answer

(a) Ray diagram showing the formation of the image when the object is placed at 2F position of a convex lens is shown below:

State the changes in the position, size and nature of the image when the object is brought from infinity up to the convex lens. Illustrate your answer by drawing the ray diagrams. Refraction through a lens, Concise Physics Class 10 Solutions.

(b) As,

$\text {Magnification} = \dfrac{\text I}{\text O} = \dfrac{\text v}{\text u}$

So, size of the image remains unchanged since, magnification is not related to the focal length of the lens.

Solved 2025 Question Paper ICSE Class 10 Physics — Question 3

Question 4(iii)