An object is placed in front of a converging lens at a distance greater than twice the focal length of the lens. Draw a ray diagram to show the formation of the image.

An object is placed in front of a converging lens at a distance equal to twice the focal length f_(1) of the lens. On the other side of the lens is a concave mirror of focal length f_(2) separated from the lens is a concave mirror of focal length f_(2) separated from the lens by a distance 2(f_(1)+f_(2)) . Light from the object passes rightward through the lens, reflects from the mirror, passes leftward throught the lens, and forms a final image of the object.

A lens produces a virtual image between the object and the lens. Draw a ray diagram to show the formation of this image.

A converging lens is used to obtain an image of an object placed in front of it. The inverted image is formed between F_(2)and2F_(2) of the lens. Draw a ray diagram to illustrate the formation of the image obtained.

An object is placed in front of a lens between its optical centre and the focus and forms a virtual, erect and diminished image. Draw a ray diagram to show the formation of the image with the above stated characteristics.

An object is kept 40 cm in front of a concave mirror of focal length of 20 cm. Find the position and nature of the image. Draw a ray diagram to show the formation of image in this case.

It is desired to obtain an erect image of an object, using concave mirror of focal length of 12 cm. (i) What should be the range of distance of an object placed in front of mirror ? (ii) Will the image be smaller or large than the object ? Draw a ray diagram to show the formation of image in this case. (iii) Where will the image of this object be, if it is placed 24 cm in front of the mirror ? Draw a ray diagram for this situation also to justify your answer. Show the positions of the pole, the principal focus and the centre of curvature in the above ray diagrams.

A virtual, diminished image is formed when an object is placed between the optical centre and the principal focus of a lens. Draw a ray diagram to show the formation of the image with the above stated characteristics.

A linear object is placed on the axis of a lens. An image is formed by refraction in the lens. For all positions of the object on the axis of the lens, the positions of the image are always between the lens and the object. (i) Name the lens. (ii) Draw a ray diagram to show the formation of the image of an object placed in front of the lens at any position of your choice except infinity.

A convex lens of focal length 20cm is placed coaxilly with a convex mirror of radius of curvature 20 cm. The two are kept 15 cm apart. A point object is placed 40 cm in front of the convex lens. Find the position of the image formed by this combination. Draw the ray diagram showing the image formation.

If the image formed by a lens for all positions of an object placed in front of it is always erect and diminished, what is the nature of this lens ? Draw a ray diagram to justify your answer. If the numerical value of power of this lens is 10 D, what is its focal length in cartesian system ?