Elements of Remote Sensing MCQs

Question 1

Pick up the correct statement from the following:

Accepted Answer

All of these

Answer

Indian space effort started in 1962 with the establishment of a rocket

Answer

Development of space (DOS) was established by the Government of India in 1972

Answer

Indian Space Research Organization (ISRO) is responsible for the space technology and its application to various activities

Question 2

Pick up the correct statement from the following:

Accepted Answer

All of these

Answer

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

Answer

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

Answer

Permeability is expressed as the ratio of the magnetic flux density (B) to the field strength of the magnetizing field

Question 3

Pick up the correct statement from the following:

Accepted Answer

All of these

Answer

Phase of a wave is expressed as a fraction of a period with respect to a reference

Answer

Phase is usually specified by angular measure with one period being 360°

Answer

The reference for finding the phase of a wave is taken from the previous passage through zero from the negative to the positive direction

Question 4

Pick up the correct statement from the following:

Accepted Answer

An increase of phytoplankton decreases the back scattering in the green region

Answer

Phytoplankton contains photosynthetically active pigment

Answer

An increase of phytoplankton increases the back scattering in the green region

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An increase of phytoplankton absorbs the bule region rapidly

Question 5

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

Accepted Answer

All of these

Answer

Spectral variation

Answer

Spatial variation

Answer

Temporal variation

Question 6

Pick up the correct statement from the following:

Accepted Answer

All of these

Answer

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

Answer

The United State's Explorer 6 transmitted the first picture of the earth in August 1959

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

Question 7

Pick up the correct statement from the following:

Accepted Answer

All the above

Answer

The minimum frequency of light for which no electrons are emitted, is called threshold frequency

Answer

Polarising angle of glass is 57.5°

Answer

At the polarising angle, the reflected and refracted rays are orthogonal

Question 8

Pick up the correct statement from the following:

Accepted Answer

All of these

Answer

The refractive index of a medium varies according to the wavelength of the radiation

Answer

The variation of the refractive index with wave length, is called dispersion

Answer

The splitting of colors of white light by passing through a prism is caused due to dispersion

Question 9

Pick up the correct statement from the following:

Accepted Answer

All of these

Answer

The surface defined by the locus of points having same phase, is called a wave front

Answer

The wave whose surface of constant phase are parallel planes, is known as a plane wave

Answer

The relative phase difference between the waves is important and not the absolute phase of a point on the wave