Mirror Image & Water Image
Mirror Image and Water Image is a popular non-verbal reasoning topic of the ADRE 3.0 Grade IV paper. The question shows a word, a number, or a figure and asks the candidate to choose the option that shows its correct image as seen in a mirror or in water. The topic is fully visual and depends on one simple idea: a mirror placed at the side reverses the figure from left to right, while water placed below reverses it from top to bottom. Once this single idea is clear, most questions can be answered quickly and accurately. Careless reversal of both directions at the same time is the commonest mistake, and it can be avoided by remembering which pair of sides the mirror or the water actually swaps.
Meaning of Mirror and Water Images
When an object is placed in front of a vertical plane mirror, the image formed is called the mirror image. In this image the left and the right of the object are interchanged, but the top and the bottom remain unchanged. When an object is placed above water, the image formed is called the water image. In this image the top and the bottom are interchanged, but the left and the right remain unchanged. A mirror placed horizontally above the object behaves like water and interchanges the top and the bottom. These three cases cover all the questions normally asked in the examination.
Rules to Remember
- Mirror on the left or the right: left and right are exchanged, top and bottom stay the same.
- Water below the object: top and bottom are exchanged, left and right stay the same.
- Mirror above the object: it acts like water and exchanges top and bottom.
- The size and the shape of the image never change, only its orientation.
- The position of the object, whether near the mirror or far from it, does not change the direction of the reversal.
- In a mirror image, a letter facing left faces right, but remains upright.
- In a water image, a letter at the top comes down, but keeps its left-right position.
- Words read in a mirror are reversed; words read in water are turned upside down.
- Numbers with a left-right difference, such as 3 and its mirror, are useful examples.
- Both mirror and water images of a symmetric figure may look the same as the original.
Types of Questions
Some questions ask for the mirror image of an English word, some for the water image of a word, some for the mirror or water image of a group of numbers, and some for the image of a simple figure such as an arrow or a flag. There are also questions that show a figure and ask which of the given images is the correct reflection, and questions that combine a figure with a marking such as a dot and ask where the dot appears in the image. Because the topic is repeated in every competitive examination, the same few words and figures are often used, and familiar patterns can be recognised quickly.
How to Solve a Mirror or Water Image Question
- Read the question and decide whether a mirror image or a water image is asked.
- For a mirror image, reverse the word or figure from left to right only.
- For a water image, reverse it from top to bottom only.
- Check the first and the last letters or the top and the bottom marks.
- Eliminate options that reverse both directions or that change the shape.
Worked Examples
The mirror image of the word "AMBULANCE" is written with its letters in the reverse order and each letter itself laterally inverted, so the A moves to the right end. The water image of the same word keeps the order of letters but turns each one upside down, so the word appears hanging down. The mirror image of the number "123" begins with the mirror of 3 and ends with the mirror of 1, while the water image of "123" keeps 1 first but turns each digit over. If a flag has its pole on the left, in the mirror image the pole will appear on the right, but it will still stand upright.
How This Topic Appears in the Examination
Mirror and water image questions usually appear as a small group of objective questions carrying one mark each. The questions are short, and the answer lies in a single correct reflection, so the candidate who knows the rule can answer within a few seconds. The options are made to look similar, and two of them are often the reverse of the correct one, so a hasty reading leads to an error. Regular practice builds a mental picture of the common words and figures, which makes the correct image easy to recognise at a glance.
Memory Tips
Remember the phrase "mirror swaps the sides, water swaps the top and the bottom". When a word is given, always look at the first and the last letter, because these decide the direction of reading in the image. When a figure is given, mark one distinct part such as a dot or an arrow and see where it goes. If a letter is symmetrical, its mirror looks the same, which can be used as a quick check. Finally, do not waste time reversing the whole word letter by letter; find the option that matches the first and the last letters, and confirm it with one middle letter.
Common Mistakes to Avoid
- Reversing both the left-right and the top-bottom at the same time.
- Reading the letters of a mirror image in the original order instead of the reversed order.
- Confusing a mirror image with a water image when the mirror is placed above.
- Choosing an option in which the letters are reversed but not laterally inverted.
- Ignoring small marks such as dots that change position in the image.
How to Prepare This Topic
- Learn the difference between a mirror image and a water image by heart.
- Practise mirror and water images of the alphabet from A to Z.
- Practise the numbers zero to nine in both kinds of image.
- Use a small mirror to check your answers while learning.
- Time yourself so that each question takes only a few seconds.
Additional Solved Examples
The mirror image of the capital letter "F" looks like a capital F facing the other way, because the two horizontal bars still point to the left of the upright, while the water image of F has the upright at the top and the bars below. The mirror image of the numeral "5" is a shape like a later "S" reversed, whereas the water image of 5 turns it over. If a triangle with a dot at the top corner is placed before a mirror at its side, the dot remains at the top in the mirror image, but if the same triangle is placed above water, the dot moves to the bottom. These examples show that the position of the dot is the quickest clue to the correct image.
Advanced Tips
For a long word, do not try to imagine every letter; check only the two ends and one letter in the middle, because the options usually differ at these places. For a figure with a left-right asymmetry, such as an arrow, the mirror image points the opposite way while the water image keeps the same left-right direction but turns the arrowhead down. If the question shows a clock and asks for its mirror image, remember that the hour and the minute hands are laterally inverted, so the time changes in a definite way. When two options seem equally good, check the smaller details such as a small line or a shade, since the correct image carries every detail of the original.
Related Non-Verbal Topics
Mirror and water image is closely related to Paper Folding and Cutting, Figure Analogy and Pattern Completion. Paper folding and cutting also uses the idea of a reflection, because when the paper is unfolded the holes are mirrored across the fold line. Figure analogy often uses a reflection as the relationship between the model pair. Pattern completion asks for the missing part of a symmetrical design, which again uses the idea of an image. Practising these topics together strengthens the understanding of how a change of direction works in a figure.
Quick Revision Checklist
- Mirror swaps left and right; water swaps top and bottom.
- A mirror above the object acts like water.
- Shape and size never change in either image.
- Check the first and the last letter of a word image.
- Follow a distinct mark such as a dot or an arrow.
- Never reverse both directions at the same time.
Frequently Asked Questions
What is the difference between a mirror image and a water image?
A side mirror reverses the figure from left to right keeping the top and bottom the same, while water reverses it from top to bottom keeping the left and right the same.
How does a mirror placed above the object behave?
A mirror placed horizontally above the object behaves like water and reverses the figure from top to bottom instead of left to right.
How do I find the mirror image of a long word quickly?
Check the first and the last letter, then one middle letter. The correct option usually matches at these places, so there is no need to reverse every letter.
Does the size of the image change in a mirror?
No. The mirror or water image keeps the same size and shape as the original and changes only its orientation.
How much time should each question take?
A mirror or water image question should take only a few seconds once the letters and the common figures are familiar.