Match List I with List II
| List I | List II |
| A. Convex mirror | I. Accommodation |
| B. Total Internal Reflection | II. Reflecting type |
| C. Ciliary muscles | III. Optical Fiber |
| D. Cassegrain Telescope | IV. Used as a rear view mirror |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A-IV, B-III, C-I, D-II
Each item in List I is a device or process of ray optics; match it with the use or feature it is known for.
A. Convex mirror — this matches IV. Used as a rear view mirror. A convex mirror always forms an erect, diminished image and so covers a wide field of view behind the vehicle.
B. Total Internal Reflection — this matches III. Optical Fiber. Light entering an optical fibre strikes the core-cladding boundary at more than the critical angle and is totally reflected again and again along the fibre.
C. Ciliary muscles — this matches I. Accommodation. The ciliary muscles change the curvature, and hence the focal length, of the eye lens so that near and far objects are both focused on the retina.
D. Cassegrain Telescope — this matches II. Reflecting type. It uses a concave (paraboloidal) primary mirror and a convex secondary mirror, so it is a reflecting telescope.