Concave and Convex Mirror Worksheet | Schemes and Mind Maps ... - Free Printable

The worksheet you've uploaded is about concave and convex mirrors, specifically focusing on using characteristic rays to determine the nature of images formed by these mirrors. The table includes diagrams, mirror types (concave or convex), and image characteristics using the SILT acronym:

- S – Size (bigger, smaller, same)
- I – Orientation (inverted or upright)
- L – Location (where the image is formed)
- T – Type (real or virtual)

Let’s go through each row and evaluate whether the answers are correct and explain the reasoning.

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🔹 Row 1: Concave Mirror

- Diagram: Object is beyond the center of curvature (C), outside F.
- Image: Drawn between F and C, inverted, smaller.
- Student Answer:
- Mirror: Concave ✔
- SILT:
- S – smaller ✔
- I – vertically inverted ✔
- L – Between F and C ✔
- T – real ✔

✔ Correct!
When an object is placed beyond C in a concave mirror, the image is:
- Real
- Inverted
- Smaller than the object
- Located between F and C

This matches the diagram and the ray tracing (ray parallel to axis reflects through F; ray through C reflects back along same path).

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🔹 Row 2: Concave Mirror

- Diagram: Object is between F and C.
- Image: Drawn beyond C, inverted, larger.
- Student Answer:
- Mirror: Concave ✔
- SILT:
- S – bigger ✔
- I – vertically inverted ✔
- L – Between F and C ✘
- T – real ✔

✘ Error in Location (L)
The image should be beyond C, not between F and C.

When the object is between F and C, the image is:
- Real
- Inverted
- Magnified (bigger)
- Formed beyond C

So the correction is:
> L – Beyond C

✔ Everything else is correct.

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🔹 Row 3: Concave Mirror

- Diagram: Object is between F and the mirror (inside focal point).
- Image: Drawn behind the mirror, upright, larger.
- Student Answer:
- Mirror: Concave ✔
- SILT:
- S – bigger ✔
- I – upright ✔
- L – behind the mirror ✔
- T – virtual ✔

✔ Correct!
When the object is inside F (closer than focal length), the image is:
- Virtual
- Upright
- Magnified
- Behind the mirror

Ray tracing:
- Ray parallel to axis → reflects through F → extended backward
- Ray toward C → reflects at same angle → extended backward
- Intersection behind mirror gives virtual image.

Perfectly accurate.

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🔹 Row 4: Convex Mirror

- Diagram: Object in front of convex mirror.
- Image: Drawn behind the mirror, upright, smaller.
- Student Answer:
- Mirror: Convex ✔
- SILT:
- S – smaller ✔
- I – upright ✔
- L – behind the mirror ✔
- T – virtual ✔

✔ Correct!
For convex mirrors, the image is always:
- Virtual
- Upright
- Smaller than object
- Behind the mirror

Ray tracing:
- Parallel ray → reflects as if from F (behind mirror)
- Ray toward C → reflects at equal angle (appears to come from behind)

These two rays diverge, and their backward extensions intersect behind the mirror.

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✔ Summary of Corrections:

| Row | Correct? | Error(s) |
|-----|---------|--------|
| 1 | ✔ Yes | None |
| 2 | ✘ No | L – Between F and C → Should be Beyond C |
| 3 | ✔ Yes | None |
| 4 | ✔ Yes | None |

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📝 Final Answer with Correction:

Row 2 (Correction):
- Concave
- SILT:
- S – bigger
- I – vertically inverted
- L – Beyond C ← corrected
- T – real

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💡 Tips for Drawing Characteristic Rays:

For concave mirrors:
1. Parallel ray → passes through F after reflection
2. Ray through C → reflects back on itself
3. Ray through F → becomes parallel to axis
4. Ray to vertex → reflects symmetrically

For convex mirrors:
1. Parallel ray → appears to come from F
2. Ray toward C → reflects at equal angle (diverges)
3. Ray to vertex → reflects symmetrically

Use only two rays to locate the image.

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✔ Final Verdict: Most answers are correct, but Row 2 has a mistake in location (L) — it should be beyond C, not between F and C.