✓ 5 MARKS
Reasoning / Why
🔥 APPEARED IN 3 BOARD SETS
(a) (i) Draw a ray diagram for the formation of the image of an object by a convex mirror. Hence, obtain the mirror equation.
(ii) Why are multi-component lenses used for both the objective and the eyepiece in optical instruments?
(iii) The magnification of a small object produced by a compound microscope is 200. The focal length of the eyepiece is $2 \text{ cm}$ and the final image is formed at infinity. Find the magnification produced by the objective.
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2024 | Series Other | Set 1 | Question 31 |
| CBSE 2024 | Series Other | Set 1 | Question 33 |
| CBSE 2024 | Series Other | Set 1 | Question 32 |
02 // OFFICIAL CBSE MARKING SCHEME BREAKDOWN
- Step 1: Stating the fundamental formula / law statement (+1 Mark)
- Step 2: Intermediate mathematical substitution or proof steps (+1 Mark)
- Step 3: Correct final value or conclusion with mandatory SI units (+1 Mark)