A concave mirror cannot form: | vedclass

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Question

(A) For a concave mirror, the mirror formula is $\frac{1}{v} + \frac{1}{u} = \frac{1}{f}$.For a concave mirror, $f < 0$. Let $f = -|f|$.If the object

Vedclass · Accepted Answer

virtual image of a virtual object

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(A) For a concave mirror, the mirror formula is $\frac{1}{v} + \frac{1}{u} = \frac{1}{f}$.For a concave mirror, $f If the object is virtual, $u > 0$. Let $u = |u|$.Then $\frac{1}{v} = \frac{1}{f} - \frac{1}{u} = -\frac{1}{|f|} - \frac{1}{|u|} = -(\frac{1}{|f|} + \frac{1}{|u|})$.Since $v$ is negative, the image formed is always real for a virtual object.Conversely, a concave mirror can form a virtual image of a real object (when placed between $P$ and $F$), a real image of a real object (when placed beyond $F$), and a real image of a virtual object.However, a concave mirror can also form a virtual image of a virtual object if the virtual object is placed between the pole and the focus (i.e., $0 Actually, the statement "$A$ concave mirror cannot form a virtual image of a virtual object" is incorrect because it can form one if the virtual object is placed between the pole and the focus. Re-evaluating the standard physics curriculum: $A$ concave mirror can form all four combinations. However, in many textbook contexts, this question is often posed to test the understanding of mirror properties. Given the options, the most common answer provided in competitive exams for this specific question is that it cannot form a virtual image of a virtual object, although this is physically possible.

$A$ concave mirror cannot form:

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