Object is placed between infinity and a device. Image formed is diminished and between pole and focus, behind it. If the image is virtual and erect, identify the device.

Convex mirror

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Concave mirror

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Spherical mirror

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Plane mirror.

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Solution

The correct option is A Convex mirror
As we know concave mirror and convex lens does not form erect image behind the device.
And the erect image formed by concave mirror behind the device is not diminished in size.
So,the device must be convex mirror.

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Similar questions

Q. Question 20
Identify the device used as a spherical mirror or lens in following cases, when the image formed is virtual and erect in each case.

(a) Object is placed between device and its focus, image formed is enlarged and behind it.

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

(c) Object is placed between infinity and device, image formed is diminished and between focus and optical centre on the same side as that of the object.

(d) Object is placed between infinity and device, image formed is diminished and between pole and focus, behind it.

Q. It is given that the image formed by an optical device is virtual, erect and diminished. Image is formed between the focus and optical centre on the same side as that of the object. Object is placed between infinity and device. Identify the device used.

Q. An object is placed between a device and its focus. The image formed is enlarged and behind it. Identify the device.

Q. It is given that the image formed is virtual, erect, enlarged and on the same side as that of the object. Object is placed between the focus and the device. Find which optical device is used.

Q. A virtual image is formed if the object is placed between focus and the pole of a concave mirror.

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Object is placed between infinity and a device. Image formed is diminished and between pole and focus, behind it. If the image is virtual and erect, identify the device.

The correct option is A Convex mirrorAs we know concave mirror and convex lens does not form erect image behind the device.And the erect image formed by concave mirror behind the device is not diminished in size.So,the device must be convex mirror.

The correct option is A Convex mirror
As we know concave mirror and convex lens does not form erect image behind the device.
And the erect image formed by concave mirror behind the device is not diminished in size.
So,the device must be convex mirror.