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Elements of Remote Sensing MCQ

The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as:

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Correct Answer: Atmospheric window

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A perfectly black body:

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Correct Answer: Absorbs all the radiations of every wave lengths

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The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called:

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Correct Answer: Spatial variation

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The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface, are called:

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Correct Answer: Active sensors

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The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target,

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Correct Answer: Reduces the contrast of the image and also its sharpness

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Which the following statements is correct?

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Correct Answer: During the night, earth emits radiation from its surface

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Coherence of two electromagnetic waves takes place if their phase difference is:

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Correct Answer: Constant in time and space

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Remote sensing techniques makes use of the properties of-----emitted, reflected or diffracted by the sensed objects:

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Correct Answer: Electromagnetic waves

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Which one of the following residual biases involves the GPS accuracy?

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Correct Answer: Signal propagation baises due to the sphere and troposphere propagation.

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A and B are two towers of equal height diametrically opposite on either side of the nadir point, at 3 km and 5 km distances. Which one of the following statements is correct?

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Correct Answer: Height displacement of A will be less than that of B

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Select the correct statement from the following:

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

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Pick up the important characteristic of a target which facilitates its identification from the following:

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Correct Answer: Spectral variation

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The value of energy quantum for radiation of any frequency is proportional to:

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Correct Answer: The frequency

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Pick up the correct statement from the following:

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Correct Answer: Indian space effort started in 1962 with the establishment of a rocket.

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Which one of the following frequency regions is a part of sun's radiation?

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Correct Answer: Infrared frequency region

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Which one of the following statements is correct?

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Correct Answer: All of these

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Due to pertubation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its

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Correct Answer: Five ground stations

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Pick up the correct definition from the following with response to GIS.

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Correct Answer: The geometric property which describes the linkage between line features is defined as connectivity.

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The basic requirement of any sensor system, is:

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Correct Answer: All of these

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Crop Acreage and Production Estimation (CAPE) was funded and taken up in 1983 by:

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Correct Answer: India

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