Draw a ray diagram to show the formation of image by a convex lens when an object is placed in front of the lens between its optical centre and principal focus.

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Solution

When we place any object between the optic center and principal focal length the image is formed on the same side
of the object and is virtual,erect and enlarged.

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Draw ray diagrams showing the image formation by a convex lens when an object is placed

(a) between optical centre and focus of the lens
(b) between focus and twice the focal length of the lens
(c) at twice the focal length of the lens
(d) at infinity
(e) at the focus of the lens

Draw ray diagram showing the image formation by a convex lens when an object is placed at infinity.

Draw well labelled ray diagrams for image formation by convex lens when

(1) Object is at 2F₁

(2) Object between F₁ and 2F₁

(3) Object between focus F₁ and optical centre O.

Q. Define principal focus of a convex lens. Draw light ray diagram of an image formed, when the object is placed in between principal focus

F

and

2 F

.
Write lens formula.
Calculate power of a lens if its focal length is

0.5 m

Q. If the object is placed at a principal focus

F_{1}

of a convex lens, draw the ray diagram for the image formation.

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Draw a ray diagram to show the formation of image by a convex lens when an object is placed in front of the lens between its optical centre and principal focus.

When we place any object between the optic center and principal focal length the image is formed on the same side of the object and is virtual,erect and enlarged.

When we place any object between the optic center and principal focal length the image is formed on the same side
of the object and is virtual,erect and enlarged.