Which one of the statements is not correct for remote sensing ?

Remote sensing survey:

It is the art and science of obtaining information about an object or feature without physically coming in contact with that object.

Stages in Remote Sensing:

1. • Emission of electromagnetic radiation, or EMR (sun/self- emission)
2. • Transmission of energy from the source to the surface of the earth, as well as absorption and scattering
3. • Interaction of EMR with the earth’s surface: reflection and emission
4. • Transmission of energy from the surface to the remote sensor
5. • Sensor data output
6. • Data transmission, processing and analysis

∴ It doesn't require absorption of energy from earth's surface.