Question

Could object distance of convex lense be negative?

Answer 1

Hint: Distances measured from the optic centre to the lens's right are regarded \[ + ve\] , whereas distances measured from the optic centre to the lens's left are considered \[ - ve\] . The sign is \[ + ve\] if you draw a line from the optic centre to the right, i.e. along the \[ + ve\] x-axis. The distances are also \[ - ve\] as you travel towards the \[ - ve\] x-axis.

Complete answer:
The lens sign convention is analogous to the mirror sign convention. Take the positive side of the lens where the object will be again. The other side of the lens is the positive side for images because a lens transmits light rather than reflecting it like a mirror. In other words, the image distance is positive and the picture is real if the image is on the opposite side of the lens as the object.

The image distance is negative and the picture is virtual if the image and the object are on the same side of the lens. According to sign conventions, object distance is always negative.If you're asking about image distance, convex lenses can have negative image distance. When the item is held at a distance less than the focal length of the lens, a picture like this is created.

Note: It's worth mentioning that in some circumstances involving many lenses, the object distance can be negative. When the picture from the first lens is on the far side of the second lens, it is called a virtual object since it is the object for the second lens.