✓ 2 MARKS
Numericals
🔥 APPEARED IN 3 BOARD SETS
A point light source rests on the bottom of a bucket filled with a liquid of refractive index $\mu = 1.25$ up to height of $10\text{ cm}$. Calculate :
(a) the critical angle for liquid-air interface
(b) radius of circular light patch formed on the surface by light emerging from the source.
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2024 | Series Other | Set 1 | Question 19 |
| CBSE 2024 | Series Other | Set 1 | Question 21 |
| CBSE 2024 | Series Other | Set 1 | Question 20 |
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)