Final answer:
A, H, I, M, O, T, U, V, W, X, and Y are the capital letters that can be read properly when placed in front of a plane mirror. These letters are symmetrical along their vertical axis, unlike letters like 'B' or 'R'.
Step-by-step explanation:
The capital letters that appear the same when viewed in a plane mirror are A, H, I, M, O, T, U, V, W, X, and Y. These letters are symmetrical along their vertical axis.When placing an alphabet chart in front of a mirror, the letters that can be read properly in the reflection are those that are unchanged upon being flipped horizontally. These include capital letters that are symmetrical along their vertical axis, such as 'A' and 'H', but not asymmetrical ones like 'B' and 'R'. For example, the letter 'A' looks the same in a mirror because it has a vertical line of symmetry; the same goes for 'H'. In contrast, letters like 'B' have no line of symmetry that coincides with the mirror reflection, making them appear reversed and therefore, not readable as the original letter.