The document discusses electromagnetic radiation (EMR) interactions with Earth surface features. When EMR from the Sun reaches the Earth's surface, it is (1) reflected, (2) transmitted into the surface, or (3) absorbed and emitted by the Earth's surface. The changes to EMR's magnitude, direction, wavelength, polarization and phase upon interaction enable remote sensors to detect these changes and obtain information about surface objects and features of interest. Reflection of EMR can be specular, reflecting regularly, or diffuse, reflecting irregularly.

1. PARTHA MANDAL
UID NO:-21143031038
M.SC IN GEO-INFORMATICS
P.R.M.S. MAHAVIDYALAYA
BANKURA UNIVERSITY
BANKURA,WEST BENGAL

2. EMR INTERACTIONS WITH EARTH SURFACE FEATURES:-
The radiant energy from the Sun, after passing through the
atmosphere when reaches the Earth's surface, three things
happens 1. some portion energy is reflected by the earth
surface, 2. some portion of energy is transmitted into the
surface 3. and some portion of it is absorbed and emitted
by the earth’s surface later on. The EMR, on interaction
with earth’s surface, experiences a number of changes in
the magnitude, direction, wavelength, polarization and
phase etc. The remote sensor detects these changes and
that enable the interpreter to obtain useful information
about the object or features of a particular interest

3. The answer is that the total energy will be broken
into three parts:
1. Absorbed
2. Reflected
3. transmitted
EMR INTERACTIONS WITH EARTH SURFACE FEATURES

5. EMR INTERACTIONS WITH EARTH SURFACE FEATURES
Reflection:- Two types of reflection, which
represent the two extreme ends of the way in
which energy is reflected from a target are:
1. Specular reflection
2. Diffuse reflection.