If the mirror is placed on OG as shown in the figure given below, then select the correct mirror image of the given figure.

Appeared in: DSSSB 6 September 2024

Explanation

The core concept is lateral inversion, where a vertical mirror flips an object from left to right.
The large shaded triangle is in the top-left corner of the original figure.
In the correct mirror image, this large triangle must be in the top-right corner.
The two smaller triangles in the bottom half are symmetrical. When flipped horizontally, their positions are swapped, but because they are identical, the overall appearance of the bottom half does not change.
The vertical orientation (top and bottom) of the figure remains unchanged.

Option A: This option likely shows an incorrect transformation, such as a water image (vertical flip) or no change at all, which does not follow the rules of reflection across a vertical mirror.
Option B: This option might depict the original figure without any change, which is incorrect as a mirror image involves lateral inversion.
Option C: This option could show a partial or incorrect inversion, for instance, flipping the small triangles upside down, which is not what a vertical mirror does.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain This question tests the concept of mirror images, which is a part of non-verbal and spatial reasoning as background academic context rather than a clinical decision trigger.
This is a general intelligence question, not directly related to clinical nursing.
However, strong logical and spatial reasoning skills are crucial for nurses. They help in interpreting complex information, such as reading monitors, understanding anatomical diagrams, and navigating hospital layouts efficiently.
What if the mirror was placed horizontally at the bottom? The image would be flipped vertically (a water image). The large triangle would be in the bottom-left, and the two small triangles would be in the top half, pointing downwards.

How to Approach the Question

First, identify the position of the mirror. In this case, it's the vertical line 'OG' to the right of the figure.
Recall the rule for a vertical mirror: it causes lateral inversion, meaning left becomes right and right becomes left.
Analyze the top part of the figure: a triangle in the top-left. Its mirror image will be a triangle in the top-right.
Analyze the bottom part of the figure: two identical, symmetrical triangles. Their mirror image will swap their positions, but since they are identical, the bottom part will appear unchanged.
Combine the transformed parts to form the complete mirror image.
Compare your mentally constructed image with the given options to find the one that matches.

Concept Tested & Keywords

Concept Tested: This question tests the concept of mirror images, which is a part of non-verbal and spatial reasoning.
Stem keywords: mirror, mirror image, figure
Lead-in keywords: select the correct

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E6 Psychology Baron Misra 5e Part 1 p. 244-246

Practise the full DSSSB 6 September 2024

Attempt every question from this paper in a timed mock, then review the full solution for each one.