Elements of Remote Sensing MCQs

Question 1

Pick up the correct statement from the following:

Accepted Answer

All of these

Answer

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

Answer

Topological characteristics of an object are independent of scale measurement

Answer

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

Question 2

Pick up the correct statement from the following:

Accepted Answer

All of these

Answer

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

Answer

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

Answer

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

Question 3

'A time varying electric field produces a magnetic field.' This phenomenon is called:

Accepted Answer

Ampere Maxwell's law

Answer

Hertz's law

Answer

Faraday's law

Answer

Kirchoff’s law

Question 4

The reflectance from a surface is called specular reflection if it follows:

Accepted Answer

Snell’s law

Answer

Lambert

Answer

Planktan

Answer

All of these

Question 5

The maximum sun's radiation occurs around:

Accepted Answer

0.55 μ wave length

Answer

0.4 μm wave length

Answer

0.7 μ wave length

Answer

None of these

Question 6

Critical angle of electromagnetic radiation takes place if

Accepted Answer

Angle of refraction is equal to 90°

Answer

Angle of incidence is equal to angle of refraction

Answer

Angle of incidence is greater than the angle of refraction

Answer

Angle of incidence is equal to 90°

Question 7

The reflection of solar energy is characterized by the water content in the leaf, in the reflective optical infrared:

Accepted Answer

Short wave-IR (1.3 - 2.7 μm) region

Answer

Visible (0.4 - 0.7 μm) region

Answer

Near-IR (0.7 - 1.3 μm) region

Answer

None of these

Question 8

Which one the following is a correct statement?

Accepted Answer

All of these

Answer

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

Answer

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

Answer

The transitional layer between two adjoining horizons is called boundary

Question 9

Electromagnetic spectrum contains:

Accepted Answer

All of these

Answer

Gamma rays (wave length < 10-10 m)

Answer

Ultraviolet rays (wave length < 10-6 m)

Answer

Infrared rays (wave length < 10-4 m)