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UPSC MAINS ESSENTIALS - ANSWER WRITING PRACTICE (07/11/2024)

UPSC MAINS ESSENTIALS 

 
Exclusive for Subscribers Daily: "The Role and Functioning of LiDAR in Archaeological Discoveries" and "Components of the Air Quality Index (AQI) and the Impact of PM2.5 and PM10 Particles"for the UPSC Exam? Discover more insights in the UPSC Exam Notes for November 07, 2024

UPSC Exam Notes presents a dedicated initiative to help you excel in Mains answer writing practice. This program covers both static and dynamic components of the UPSC Civil Services syllabus across various General Studies (GS) papers. Each session is crafted to provide valuable insights and techniques to improve your answer-writing skills, aiming to enrich your preparation for the UPSC CSE Mains. Start with today’s answer-writing exercise based on GS-3 topics to evaluate and track your progress.

🚨 Additionally, UPSC Exam Notes releases its November issue of the monthly magazine, packed with critical content, expert analyses, and recent updates to assist your preparation. Dive into the issue to enhance your knowledge base. We welcome your feedback and insights in the comments or via email. 🚨

UPSC Exam Notes offers guidance on structuring Mains answers effectively to maximize your score and presentation.

Introduction

  • Begin your answer with a concise introduction of 3-5 lines. Avoid one-liner introductions as they often lack context.
  • Start by providing basic information, definitions, or key facts from trusted sources to set the foundation for your answer.

Body

  • This is the core of your answer. Analyze the question carefully to understand its requirements and address each aspect fully.
  • Use a mix of points and short paragraphs for clarity. Avoid long paragraphs or purely point-based responses, as balanced formatting enhances readability.
  • Incorporate data from reliable sources, such as government publications, to strengthen your arguments and make your answer more credible.
  • Analyze based on the question’s demand, but avoid over-analysis, which may dilute the answer’s impact.
  • Highlight key terms by underlining, helping your response stand out and improving its presentation.
  • Use flowcharts or tree diagrams where relevant to organize information efficiently, saving time and boosting clarity. These should be applied thoughtfully and only when they add real value.

Way Forward/Conclusion

  • Conclude on a positive, forward-looking note. Highlight potential solutions or the broader implications of your analysis.
  • If an unresolved issue is crucial to the topic, briefly mention it, but avoid repeating points from the introduction or body.
  • Where applicable, reference findings from relevant national or international reports, surveys, or quotations to add weight to your conclusion.

Self-Evaluation

This is a crucial step in answer-writing practice. UPSC Exam Notes provides evaluation guidelines to help you critically assess your responses and refine your thought process for future improvement.
 
Question 1.LiDAR (Light Detection and Ranging) technology has played a crucial role in advancing archaeological discoveries. Describe how LiDAR functions.
 

Model Answer (Approach Outline):

This is not a definitive model answer but an approach to tackling the question effectively.

 

Introduction:

  • LiDAR, or Light Detection and Ranging, is a remote sensing method that employs pulsed laser light to measure variable distances from a sensor, often mounted on an aircraft, to the Earth’s surface.

  • As per the US Geological Survey, LiDAR data can create high-resolution 3D ground elevation models with vertical accuracy reaching up to 10 cm.

  • This technology enables the production of precise three-dimensional data regarding the Earth’s surface and terrain, which is highly valuable for fields like geography, policymaking, conservation, and engineering. Recently, however, LiDAR has shown promising applications in archaeological research.

Body:

Working principle of LiDAR:

  • LiDAR systems include a laser, a scanner, and a GPS receiver. The laser emits pulses that travel to the ground, interacting with vegetation, buildings, and various topographic features. The light is then reflected or scattered, and the sensor records this return.

  • The system calculates the distance between the sensor and the ground by measuring the time taken for the light pulses to travel to and from the surface. This data, combined with GPS and Inertial Measurement System (IMS) information, is used to create an elevation map of the Earth.

  • The initial LiDAR data appears


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