A. C = v
B. C = /v
C. C = v
D. C = 1/
Elements of Remote Sensing
Pick up the correct statement from the following ?
A. Topology describes the geometric characteristic of objects which do not change under transformations and are independent of any coordinate system
B. Topological characteristics of an object are independent of scale measurement
C. The three elements of topology are adjacency, containment, and connectivity
D. All of these
Coherence of two electromagnetic waves takes place if their phase difference is_________________?
A. Constant in time
B. Constant in space
C. Constant in time and space
D. None of these
The coherence length over which there is a strong relationship between amplitudes is_________________?
A. Directly proportional to the bandwidth
B. Inversely proportional to the bandwidth
C. The square of the bandwidth
D. None of these
Remote sensing techniques make use of the properties of ______________ emitted, reflected or diffracted by the sensed objects?
A. Electric waves
B. Sound waves
C. Electromagnetic waves
D. Wind waves
Pick up the correct statement from the following?
A. The minimum frequency of light for which no electrons are emitted, is called threshold frequency
B. Polarising angle of glass is 57.5°
C. At the polarising angle, the reflected and refracted rays are orthogonal
D. All the above
A reduction of nitrogen nutrient in plants_______________?
A. Affects leaf colour
B. Reduces pigment concentration
C. Increase the visible reflectivity
D. All of these
Which one of the following attributes is not associated with digital maps_______________?
A. Colour
B. Symbology
C. Legends
D. South arrow
Spatial variation in horizontal and vertical directions is caused due to_________________?
A. Physical weathering of rocks
B. Chemical weathering of rocks
C. Biological weathering of rocks
D. All of these
Which one of the following errors is produced by platform characteristics of the sensor ?
A. Altitude variation
B. Altitude
C. Orbit drift
D. All of these
