Q19 of 27 Page 132

Find the focus by drawing a ray diagram using the position of source S and the image S’ given in the figure Q-I9. (AS5)


From the figure we can infer that the image is magnified & inverted. Moreover, it is on the opposite side of the lens. We cannot use concave lens as it will produce diminished image of the object. In convex lens ,if the object is placed between F & C, then only the required condition can be achieved.



More from this chapter

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17

Figure Q-17 shows ray AB that has passed through a divergent lens. Construct the path of the ray up to the lens if the position of its foci is known. (AS5)

 18

Figure Q- 18 shows a point light source and its image produced by a lens with an optical axis N1N2. Find the position of the lens and is foci using a ray diagram. (AS5)

 20

A parallel beam of rays is incident on a convergent lens with a local length of 40cm. Where should a divergent lens with a focal length of 15 cm be placed for the beam of rays to remain parallel after passing through the two lenses? Draw a ray diagram. (AS5)

 21

Draw a ray diagram for the following positions and explain the nature and position image.

Object is placed at C2