Mirror & Water Image
Mirror and Water images are essential topics in the General Intelligence section of competitive exams like UPSC. A mirror image is the reflection of an object when placed in front of a mirror. In a standard vertical mirror, the image undergoes a process called lateral inversion. This means the left side of the object appears on the right side of the image, and the right side appears on the left. However, the top and bottom of the object remain in their original positions.
Concepts (3)
Lateral inversion is the sideways reversal of an image. In a vertical mirror, the right side of the object appears as the left side of the image. For example, the letter 'B' will face the opposite direction in a mirror.
Lateral inversion is the sideways reversal of an image. In a vertical mirror, the right side of the object appears as the left side of the image. For example, the letter 'B' will face the opposite direction in a mirror. The top of 'B' stays at the top. This concept is the foundation of all mirror image questions.
When a clock is seen in a mirror, the time appears to change. If the original time is 'H' hours and 'M' minutes, the mirror time is found by subtracting it from 11:60. For example, if the real time is 4:00, the mirror image shows 8:00 (12 minus 4).
When a clock is seen in a mirror, the time appears to change. If the original time is 'H' hours and 'M' minutes, the mirror time is found by subtracting it from 11:60. For example, if the real time is 4:00, the mirror image shows 8:00 (12 minus 4). This is a common shortcut for time-based reasoning.
Vertical inversion happens when an object is reflected upside down. This occurs in water images or when a mirror is placed horizontally at the bottom. The top part of the object moves to the bottom.
Vertical inversion happens when an object is reflected upside down. This occurs in water images or when a mirror is placed horizontally at the bottom. The top part of the object moves to the bottom. For example, the letter 'M' becomes 'W' in a water image. The left and right sides do not swap.
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