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Q: How many focal lenghts can the object be until the image is no longer real?
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Related questions

What is the relationship between object distance image distance and focal length of concave mirror?

Sum of reciprocal of object distance and reciprocal of image distance gives the reciprocal of focal length


What is the relationship between object distance image distance and focal length of a concave mirror?

Sum of reciprocal of object distance and reciprocal of image distance gives the reciprocal of focal length


When does a Convex lens form a virtual or real image?

When object is within the focal distance then virtual image is formed. But when the object is placed beyond the focus of the covex lens ie if the distance of the object is more than focal length then real image is formed.


When does a convex lens forms a real or virtual image?

When object is within the focal distance then virtual image is formed. But when the object is placed beyond the focus of the covex lens ie if the distance of the object is more than focal length then real image is formed.


What is the limit of the object distance to produce a real image?

Focal Length


If an object is closer to a convex lens than one focal length the image is .?

If an object lies within the focal length of a convex lens, its image will be erect, bigger in size and virtual. It will be on the same side of the object.


Focal length of a concave mirror?

1/object distance + 1/ image distance = 1/focal length


Place an object between a magnifying lens and its focal point the image is?

Place an object between a magnifying lens and its focal point. The image is right side up and larger than the object


Why do images in a concave mirror appear inverted?

If an object's distance from the concave mirror is greater than the mirror's focal length, then the mirror image of it will be inverted. If the distance from the concave mirror is less than the focal length of the mirror, the image will not be inverted. No image will be produced if the distance from the mirror to the object is equal to the mirror's focal length.


A converging lens of focal length f produces a real image of a real object when the object is what?

farther then f from the lens


How large the image will be if the object is 25cm tall?

That depends on the position and focal length of the optical elements forming the image.


where will be image form in concave lens when object is placed at focal lenth?

When the object is located at a location beyond the 2F point, the image will always be located somewhere in between the 2F point and the focal point (F) on the other side of the lens.