Remote sensing of objects can be done through various means such as A. remote sensors, B. human eyes and C. photographic system. Which of the following represents the true order of their evolution.
Explanation
Option (B) BCA is correct. The context indicates that human eyes are the most primitive and natural means of remote sensing, existing since the beginning of human existence. Photographic systems came next with the invention of cameras for capturing images. The context states that 'The term remote sensing was first used in the early 1960s,' indicating that modern remote sensors are the most recent development in this evolution. The text also contrasts human eyes and photographic systems (which respond to a limited portion of energy) with 'present day remote sensing devices' that react to a much wider range of radiations, clearly establishing that remote sensors came last in the evolutionary sequence.
Solution Steps
Step 1: Identify the three means of remote sensing mentioned - A. remote sensors, B. human eyes, C. photographic system.
Step 2: Analyze the context to determine the chronological order - human eyes are natural and primitive, photographic systems were developed later, and the term 'remote sensing' was first used in the early 1960s for modern remote sensors.
Step 3: Arrange in order of evolution: Human eyes (B) → Photographic system (C) → Remote sensors (A).
Step 4: Select option (B) BCA as the correct answer.