Question

Match List-I with List-II for the index of refraction for yellow light of sodium (589 nm)

LIST-I (Materials)		LIST-II (Refractive Indices)
A.	Ice	I.	1.309
B.	Rock salt (NaCl)	II.	1.460
C.	CCl₄	III.	1.544
D.	Diamond	IV.	2.417

Choose the correct answer from the options given below:

• A. A - II, B - III, C - I, D - IV
• B. A - I, B - III, C - II, D - IV
• C. A - IV, B - III, C - II, D - I
• D. A - I, B - IV, C - III, D - II

Hint:

It's useful to have a mental scale of refractive indices: - Air: \(\approx\) 1.00 - Water/Ice: \(\approx\) 1.3 - Common Glass/Plastics/Liquids: \(\approx\) 1.4 - 1.6 - Diamond/High-index materials:>2.0

Answer 1

The Correct Option is B

This question requires knowledge of the approximate refractive indices of common materials. We can match them by considering their typical values. - D. Diamond: Diamond is famous for its very high refractive index, which gives it its brilliance. The highest value in the list is 2.417. So, D matches IV. - A. Ice: Ice is frozen water, and its refractive index is close to that of water (which is about 1.33). The lowest value in the list is 1.309, which is a very reasonable value for ice. So, A matches I. - B. Rock salt (NaCl): This is a crystalline solid. Its refractive index is known to be in the mid-range, typically around 1.54. So, B matches III. - C. CCl4 (Carbon Tetrachloride): This is a dense organic liquid. Its refractive index is typically in the mid-range, lower than that of rock salt. The value 1.460 is correct for CCl4. So, C matches II. The correct set of matches is A - I, B - III, C - II, D - IV.