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A lens forms an erect, magnified and vir...

A lens forms an erect, magnified and virtual image of an object.
Draw a labelled ray diagram to show the image formation.

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A lens forms an erect, magnified and virtual image of an object. Name the lens.

We wish to obtain an erect image of an object, using a concave mirror of focal length 15 cm. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in this case.

A lens forms an upright and diminished image of an object when the object is placed at the focal point of the given lens. Draw a ray diagram to show the image formation.

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

(a) With the help pf a ray diagram , show how a concave mirror is used to obtain an erect and magnified image of an object . (b) Using the ray diagram below , obtain the mirror formula and the expression for linear magnification.

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.

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 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.

A mirror which always forms a virtual, diminished and erect image of an object is :

If the image formed by a spherical mirror for all positions of the object placed in front of its is always erect and diminished , what type of mirror isit ? Draw a labelled ray diagram to support your answer.

ICSE-SELF ASSESSMENT PAPER -3-SECTION .B.
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  7. State the factors affecting the resistance of a conductor.

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  13. A battery is designed by connecting four cells, each of emf 1.5 V and ...

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  16. A cell of e.m.f. 2V and internal resistance 1.2.Omega is connected wit...

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  19. A ray of monochromatic light is incident from air on a glass slab. ...

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  20. A ray of monochromatic light is incident from air on a glass slab. ...

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