UP Police Constable · Bite-size lessons
Mirror & Water Image
About 7 min · Mental Aptitude / IQ / Reasoning · English
Time worked out from the lesson's 452 words at 150 words a minute, plus a minute for each question.
Mirror and water image questions test a candidate's spatial reasoning and visualization ability. The logic of this topic is formulaic — once you grasp the reflection rules, accuracy becomes near-perfect with minimal time investment.
Key ideas
- Mirror Image: Reflection along a vertical axis placed to the left or right of the object. Left becomes right, right becomes left; top and bottom remain unchanged. Imagine holding text up to a mirror — that's your mirror image.
- Water Image: Reflection along a horizontal axis placed below the object. Top becomes bottom, bottom becomes top; left and right positions remain unchanged. Visualize text reflected in still water.
- Vertical Symmetry: Letters like A, H, I, M, O, T, U, V, W, X, Y have vertical symmetry — their mirror images look identical to the original. Always check for symmetry first to eliminate options quickly.
- Horizontal Symmetry: Letters like B, C, D, E, H, I, K, O, X have horizontal symmetry — their water images may look similar or identical. Fewer letters are horizontally symmetrical than vertically symmetrical.
- Asymmetric Characters: Letters like F, G, J, L, N, P, Q, R, S, Z change appearance significantly in both mirror and water images. These are high-yield for elimination in multiple-choice questions.
Watch out for
- Confusing mirror with water image: Students apply vertical flip when horizontal is needed or vice versa. Fix: Always identify the axis first — vertical line = mirror, horizontal line = water. Draw a small axis marker if needed.
- Forgetting to reverse letter sequence in mirror: Students flip individual letters but keep the same order. Fix: Mirror images require BOTH sequence reversal AND individual letter flipping. "UP" in mirror is not "ᴜꟼ" but "ꟼᴜ" (reversed position plus flipped shape).
- Assuming symmetrical letters need no change: Even symmetrical letters must be checked in context. Fix: A may be symmetrical, but if it's part of a word, its position in the sequence still changes in mirror image.
Quick reference
- Mirror = Vertical Flip: Left↔Right swap; top/bottom unchanged; sequence reverses
- Water = Horizontal Flip: Top↔Bottom swap; left/right unchanged; sequence same
- Symmetry shortcut: A, H, I, M, O, T, U, V, W, X, Y identical in mirror; check options first
- Clock mirror formula: Mirror time = 12:00 − Original time
- Elimination strategy: Reject options with wrong axis reflection immediately
Check yourself: 3 questions
1. If a mirror is placed vertically on the right side of the word 'POLICE', which of the following will be its mirror image?
2. The clock shows 3:15. What time will the clock show in its mirror image if the mirror is placed vertically in front of the clock?
3. How will the number 3825 appear when reflected in water (water image)?
This lesson is cut from the topic's note, not rewritten. Fact-checked on 18 Oct 2026: an AI-assisted check of this note against cited sources; the errors it found were corrected that day. Some errors may remain. The questions are from Shishya's validated question bank.
Read the full noteFlashcards for this topic
Saves this lesson and its 3 questions in this browser on this phone. No sign-in; nothing about you is saved or sent. A saved copy is not updated until you save it again. Parts that load from the server when you use them (the AI tutor, adaptive practice, sign-in) still need a connection.