elements of remote sensing MCQs – Page 2

A. Angle of incidence is equal to 90

B. Angle of incidence is equal to angle of refraction

C. Angle of incidence is greater than the angle of refraction

B. When the electric vector is at right angles to the plane of incidence, horizontal polarization wave is formed

C. When the electric field oscillates in the direction of the electric vector, a plane polarised wave is formed

D. When the electric vector is in the plane of incidence, vertical polarisation is formed

A. Frequency of a wave is measured in Hertz (Hz)

B. Amplitude of a wave is the height of its crust from the mid-point

C. Frequency is the number of wave crests passing a fixed point in one second

A. The reciprocal of the energy

B. The square of the frequency

C. The square root of the frequency

B. None of these

C. Spectral variation

D. Spatial variation

A. The visible light as carrier with frequency of the order of 5 1014 Hz

C. Propagation of infrared radiation

D. High frequency radio waves

A. Angle of incidence = angle of refraction

B. Angle of refraction = sum of the angles of incidence and refraction

C. All the above

A. The oscillation of charged particles sets up changing electric fields

B. These are produced by the motion of electric charge

C. The changing electric fields induce the changing magnetic fields in the surrounding medium

B. None of these

C. Near polar orbit

D. Circular orbit

A. 30,000 km

B. 44,000 km

C. 26,000 km

B. 36,000 km

C. 15,200 km

D. 18,400 km

A. Ozone hole

B. The rate of transfer of radiant energy is called flux and is expressed in watts

C. The radiant energy which falls upon a surface is termed as irradiance

D. Radiant energy expressed in Joules, is the energy associated with electromagnetic radiation

A. During successive across-track imaging, the earth rotates beneath the sensor

C. The satellite images a skewed area</strong>

D. ch one of the following statements is/are correct?

B. Reduces pigment concentration

C. Increase the visible reflectivity

D. Affects leaf colour

A. The three elements of topology are adjacency, containment, and connectivity

C. Topological characteristics of an object are independent of scale measurement

D. Topology describes the geometric characteristic of objects which do not change under transformations and are independent of any coordinate system

A. Six ground stations

B. Three ground stations

C. Four ground stations

A. The ratio of the up flux and down flux just above the snow surface, is called albedo

C. Spectral albedo of snow is calculated for the semi-infinite snow thickness

D. Water equivalent height of snow is the height of water column obtained by melting snow

A. Radiometric resolution

B. Spatial resolution

C. Spectral resolution

B. Constant solar zenith angles and similar illumination conditions

C. Synoptic view of a large area

D. Repetitive observations of the same area with intervals of a few minutes to a few weeks

A. Permeability is expressed as the ratio of the magnetic flux density B. to the field strength of the magnetizing field

B. Permeability is a measure of conducting the magnetic lines of force in the material

D. Permeability is a measure of the extent to which magnetic lines of force can penetrate a medium

B. The effect of grain size on reflection is maximum in the near-IR region

C. The effect of grain size on reflection is low in the visible region of the spectrum

D. Snow albedo falls at all wave length with the increase of grain size

A. Biological weathering of rocks

B. Chemical weathering of rocks

D. Physical weathering of rocks

A. Trans movement

B. Vehicle tracking

D. Land navigation

A. Visible (0.4

B. Near-IR (0.7

D. None of these

A. Detection of the GPS signals

B. Processing the data in the built-in-computer

D. Decoding the GPS signal</strong>

B. Increases the contrast of the image but reduces the sharpness

C. Increases both the contrast and sharpness

D. Reduces the contrast but increases the sharpness

B. The first man-made satellite, Sputnik-l was launched on 4th October, 1957

C. Television Infrared Observation Satellite (TIROS) designed for meteorological observations, started systematic earth observations from space from 1, April, 1960

D. The United States Explorer 6 transmitted the first picture of the earth in August 1959

A. During the day, earth reflects solar radiation

B. During the day, earth reflects both solar radiations the emission from its surface

C. During the night, earth emits radiation from its surface

A. C = v

B. C = /v

C. C = 1/

A. The function of an information system is to improve one s ability to make decisions

B. The information system is the chain of operations

C. A map is a collection of stored, analysed data, its stored information is suitability used in making decisions

A. Horn antenna

C. Slotted antenna

D. Parabolic antenna

A. Gamma rays (wave length < 10-10 m)

C. Infrared rays (wave length < 10 -4 m)

D. Ultraviolet rays (wave length < 10-6 m)

A. The layers of the soil parallel to the earth surface are called horizons

B. The vertical section of the soil extending into the parent material, is called profile

C. The transitional layer between two adjoining horizons is called boundary

A. Radio frequency region

C. Infrared frequency region

D. Ultraviolet frequency region

A. The interaction of the electromagnetic radiation with the target

B. The emission of electromagnetic radiation from the target

D. Neither A. nor B.