When a plano-convex lens is placed on a glass slab, an air film is formed which is wedge-shaped. The film thickness gradually changes from the point of contact (negligible thickness) outward.
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:
Match the LIST-I with LIST-II
| LIST-I | LIST-II | ||
|---|---|---|---|
| A. | Compton Effect | IV. | Scattering |
| B. | Colors in thin film | II. | Interference |
| C. | Double Refraction | III. | Polarization |
| D. | Bragg's Equation | I. | Diffraction |
Choose the correct answer from the options given below:
Match Fibre with Application.\[\begin{array}{|l|l|} \hline \textbf{LIST I} & \textbf{LIST II} \\ \textbf{Fibre} & \textbf{Application} \\ \hline \hline \text{A. Silk fibre} & \text{I. Fire retardant} \\ \hline \text{B. Wool fibre} & \text{II. Directional lustre} \\ \hline \text{C. Nomex fibre} & \text{III. Bulletproof} \\ \hline \text{D. Kevlar fibre} & \text{IV. Thermal insulation} \\ \hline \end{array}\]