Yes virtual object is possible
A concave lens will produce a virtual image longer in size than the object. This occurs when the object is located between the lens and its focal point. The virtual image will appear on the same side as the object and will be larger in size.
[object Object]
A virtual image is always upright in relation to the object.
Yes, a concave lens can form a real or virtual image on a screen depending on the object position relative to the focal point of the lens. If the object is placed between the lens and its focal point, a virtual image is formed on the same side as the object. If the object is beyond the focal point, a real inverted image can be formed on a screen.
No. Virtual functions are invoked according to the runtime type of the object. That is; the most-derived override is automatically invoked even when the runtime type of the object cannot be determined at compile time. This is achieved through the object's virtual table. Static methods do not have any object associated with them; they can be invoked even when no object of the type exists. Without an object, there can be no virtual table. Thus static functions cannot be virtual. They are mutually exclusive concepts.
The term virtual object refers to computer simulations of real objects; it could be described as a technological illusion. Reality, in comparision, is what it appears to be. Not only does it look like a chair (for example) but you can actually sit in it. Whereas, a real person does not sit in a virtual chair, although a virtual person can do so.
An object located beyond the focal point of a converging lens will produce a virtual image on the same side as the object. This virtual image will be upright, magnified, and appear to be located closer to the lens than the object itself.
Use of iframes or frames
A concave mirror should be used to obtain a diminished and virtual image of an object. This type of mirror can create virtual images that are smaller in size than the object itself.
A concave mirror is required to obtain a virtual image of the same size as the object. The object should be placed at the focal point of the mirror to form the virtual image of the same size.
When the object is placed between the focal point and the mirror in a concave mirror, an enlarged virtual image equal in size to the object is formed. In this case, the image distance is greater than the object distance, and the image is virtual, upright, and magnified.
To get a virtual upright and smaller image from a convex mirror, place the object in front of the mirror but between its focal point and the mirror. This will produce a virtual image on the same side as the object that is upright and smaller than the object.