Generated by claude-sonnet-4-6 · 2026-06-15 06:47 · grounding rag
Model Answer
(a) The speed of light in a medium is inversely related to its optical density. A medium with higher optical density has a lower speed of light, and vice versa.
(b) Higher speed → lower optical density. Arranging in ascending order of optical density (lowest to highest):
- A = 2.25 × 10⁸ m/s (least dense)
- C = 2.08 × 10⁸ m/s
- B = 2.00 × 10⁸ m/s (most dense)
Ascending order of optical density: A < C < B
---
Explanation
- Part (a) tests the concept that optical density is inversely proportional to speed of light — slower speed means optically denser medium.
- Part (b) requires reversing the speed order: highest speed = lowest optical density. Always arrange speed in descending order to get optical density in ascending order.
- These are standard 1-mark each sub-questions; keep answers brief and direct.