Category: Elements of Remote Sensing

A. The surface defined by the locus of points having same phase, is called a wave front
B. The wave whose surface of constant phase are parallel planes, is known as a plane wave
C. The relative phase difference between the waves is important and not the absolute phase of a point on the wave
D. All of these

A. 130 km
B. 230 km
C. 250 km
D. 500 km

A. Sun as the source of energy
B. Flash light as a source of energ
C. Its own source of energy
D. None of these

A. 8
B. 12
C. 16
D. 24

A. Phase of a wave is expressed as a fraction of a period with respect to a reference
B. Phase is usually specified by angular measure with one period being 360°
C. The reference for finding the phase of a wave is taken from the previous passage through zero from the negative to the positive direction
D. All of these

A. C = v
B. C = /v
C. C = v
D. C = 1/

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

A. Constant in time
B. Constant in space
C. Constant in time and space
D. None of these

A. Directly proportional to the bandwidth
B. Inversely proportional to the bandwidth
C. The square of the bandwidth
D. None of these

A. Electric waves
B. Sound waves
C. Electromagnetic waves
D. Wind waves