OBJECTIVE FORESTRY

FORESTRY

REMOTE SENSING

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When light is reflected off a surface, it is detected by passive remote sensing satellites and produces a(n) ____, which we use to identify different surfaces.
A
Rainbow
B
Pulsar
C
Spectral Signatures
D
Awe inspiring moment
Explanation: 

Detailed explanation-1: -Passive sensors detect natural radiation that is emitted or reflected by the objects or surrounding area being observed. Reflected sunlight is the most common source of radiation measured by passive censors. Examples of passive remote sensors include film photography, infra-red, charge-coupled devices, and radiometers.

Detailed explanation-2: -In remote sensing, a detector measures the electromagnetic (EM) radiation that is reflected back from the Earth’s surface materials. These measurements can help to distinguish the type of land covering. Soil, water and vegetation have clearly different patterns of reflectance and absorption over different wavelengths.

Detailed explanation-3: -A device designed to detect, measure, and analyze the spectral content of the incident electromagnetic radiation is called a spectrometer.

There is 1 question to complete.