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The reflector combined with autocollimator can be used for checking
  • a)
    Alignment
  • b)
    Parallelism
  • c)
    Circularity
  • d)
    Distance between two far off points
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The reflector combined with autocollimator can be used for checkinga)A...
Auto-Collimator is an instrument used to measure small angular inclinations. It is also used to check straightness, flatness and alignment.
A collimator is a tube for projecting parallel rays of light. It consists simply of a light source and a collimating lens (converging lens).
The principle of working of this instrument is the basic principle of reflection of light.
  • Let a point source of light be placed at the principle focus of a converging lens; After passing through the lens, the beam of light becomes parallel
  • If this beam of light strikes a flat reflecting surface which is perpendicular to the optical axis, it will be reflected back along its original path and refocused at the same point
  • Now is the mirror is tilted by an angle θ the beam of light will be reflected back but deflected through an angle 2θ and will be focused in the same plane as the light source but displaced to one side of it
The displacement will be, d = 2fθ where f is the focal length of the lens.
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The reflector combined with autocollimator can be used for checkinga)A...
Reflector combined with autocollimator for checking alignment

The reflector combined with an autocollimator is commonly used in various industries, including railways, for checking alignment. This combination of instruments allows for precise measurement and verification of the alignment of different components or structures. Here's an explanation of how the reflector combined with an autocollimator can be used for checking alignment:

Alignment:
Alignment refers to the proper positioning and orientation of various components or structures. It is crucial to ensure that different parts are aligned correctly to avoid any issues or problems. The reflector combined with an autocollimator can be utilized to check the alignment by measuring the angular deviation between a reference line and the line of sight.

Working Principle:
The reflector combined with an autocollimator works based on the principle of reflection and measurement of angular deviation. Here's a step-by-step explanation of how it can be used for checking alignment:

1. Set up the reflector: The reflector is positioned at a specific location or reference point. It acts as a target for the autocollimator.

2. Position the autocollimator: The autocollimator is placed at a suitable distance from the reflector, ensuring a clear line of sight.

3. Measure the angular deviation: The autocollimator emits a collimated light beam towards the reflector. The reflector reflects the light beam back to the autocollimator.

4. Observe the autocollimator: The autocollimator has a reticle or scale that allows the user to measure the angular deviation between the emitted and reflected light beams. This angular deviation indicates the misalignment, if any.

5. Adjust the alignment: Based on the measured angular deviation, adjustments can be made to align the components or structures properly. This may involve moving or rotating the target until the desired alignment is achieved.

Benefits of using reflector combined with autocollimator:
- Precise measurement: The combination of reflector and autocollimator enables accurate measurement of angular deviations, providing valuable information about the alignment.
- Time-saving: The reflector combined with an autocollimator allows for quick and efficient alignment checking, reducing downtime and increasing productivity.
- Non-contact measurement: The measurement process is non-contact, eliminating the risk of damage to the instruments or the components being aligned.
- Versatility: The reflector combined with an autocollimator can be used for various alignment tasks in different industries, including railways.

In conclusion, the reflector combined with an autocollimator is an effective tool for checking alignment. It provides accurate measurements of angular deviations, allowing for precise alignment adjustments to be made. This combination is widely used in the railway industry and other sectors to ensure proper alignment of components and structures.
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The reflector combined with autocollimator can be used for checkinga)Alignmentb)Parallelismc)Circularityd)Distance between two far off pointsCorrect answer is option 'A'. Can you explain this answer?
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