Elements of Remote Sensing MCQs

Question 1

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

Accepted Answer

Electromagnetic waves

Answer

Electric waves

Answer

Sound waves

Answer

Wind waves

Question 2

A perfectly black body:

Accepted Answer

All the above

Answer

Is a diffuse emitter

Answer

Absorbs all the radiations of every wave lengths

Answer

Emits power of every wave length

Question 3

Which one of the following parameters is considered to determine the reflectance of a vegetation canopy?

Accepted Answer

All of these

Answer

Solar zenith angle

Answer

Azimuth angle

Answer

Look angle

Question 4

Which one of the following statement is correct?

Accepted Answer

All of these

Answer

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

Answer

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

Answer

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

Question 5

The coherence length over which there is a strong relationship between amplitudes is;

Accepted Answer

Inversely proportional to the bandwidth

Answer

Directly proportional to the bandwidth

Answer

The square of the bandwidth

Answer

None of these

Question 6

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

Accepted Answer

India

Answer

USA

Answer

European Union

Answer

Russia

Question 7

"An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media". This phenomenon is known as:

Accepted Answer

Fresnel reflection

Answer

Fresnel refraction

Answer

Snell's law

Answer

None of these

Question 8

Which one of the following geometric errors of satellite sensors is random?

Accepted Answer

Altitude variation

Answer

Scan skew

Answer

Panoramic distortion

Answer

Earth rotation

Question 9

In GPS, receivers are used are;

Accepted Answer

Quartz clocks

Answer

Electronic clocks

Answer

Atomic clocks

Answer

Mechanical clocks