Question

Which one of the statements is NOT CORRECT for remote sensing?

• A. \( \text{It requires absorption of energy by the Earth's surface} \)
• B. \( \text{It requires propagation of energy through atmosphere} \)
• C. \( \text{It requires energy interaction with the Earth's surface features} \)
• D. \( \text{It requires emission of electromagnetic radiation} \)

Hint:

Distinguish between passive (relies on external sources) and active (provides its own source) remote sensing. Not all types depend on the Earth's emission.

Answer 1

The Correct Option is D

While the Earth's surface emits electromagnetic radiation (which is the basis of thermal remote sensing), not all remote sensing requires this emission as the primary energy source. Passive remote sensing relies on the reflection or scattering of naturally available energy (like sunlight). Active remote sensing provides its own energy source. The other statements are generally true for remote sensing processes.