Question

Identify the device used as a spherical mirror or lens in the following
cases when the image formed is virtual and erect in each case:-


i) object is placed between the focus and device, image formed is
enlarged and on the same side as that of the object.



ii) object is placed between infinity and device, image formed is
diminished and between pole and focus behind it.


Also draw the ray diagrams to justify your answer.​

Answer 1

Answer:

1. mirror

2. lens

Hope this hepls you .

Answer 2

Question : Identify the type of mirror or lens in the following cases :-

1. object is placed between the focus and the device. Image is formed enlarged on the same side of the object.
2. Object is placed between infinity and device, image formed is diminished and between pole and focus behind it.

Answer :-

1. A convex lens forms :-

• a virtual, erect, enlarged image on the same side of the object.
• When the object is placed between the focus and the device.

2. A convex mirror forms

• a virtual, erect, diminished image on the opposite side of the object or behind the mirror.
• when the object is kept between the pole and infinity.

Hence the answers are : Convex lens, convex mirror.

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