Q1. Discuss in detail, energy-earth interaction giving suitable example.
- Energy-earth interaction describes how EMR from a source interacts with Earth's atmosphere and surface.
- Atmospheric interactions include absorption by gases (H₂O, CO₂, O₃) and scattering (Rayleigh, Mie, Non-selective).
- Surface interactions are primarily reflection, absorption, and transmission, varying with material properties.
- Reflection can be specular (mirror-like) or diffuse (scattered in many directions), with diffuse being crucial for sensing.
Answer: Energy-earth interaction is a fundamental concept in remote sensing, describing how electromagnetic radiation (EMR) originating from a source, primarily the sun in passive remote sensing, interacts with the Earth's atmosphere and surface features before being recorded by a sensor. Understanding these interactions is crucial for interpreting remotely sensed data and deriving meaningful information about the Earth's surface and processes. The journey of EMR begins with its generation at the sourc...