Physics - Geometrical Optics Question with Solution | TestHub

Magnification Variation: The magnification of a concave mirror is not uniform. Objects closer to the focus ($F$) are magnified more than objects closer to the center of curvature ($C$).

Image Formation: The square object is placed between $C$ and $F$. The part of the square closer to $F$ will be magnified significantly more than the part closer to $C$.

Tilted Line: Consider the horizontal side of the square. The end of this side closer to $F$ will be magnified upwards more than the end closer to $C$. This differential magnification causes the horizontal line to appear tilted in the image. The greater the difference in distance from $F$, the more pronounced the tilt will be.

Inverted Image: The image is also inverted.

Therefore, the horizontal part appears as a tilted straight line due to the combined effects of varying magnification and image inversion.