Elements of Remote Sensing MCQs

Question 1

Pick up the correct statement from the following:

Accepted Answer

All of these

Answer

The wave length of gamma rays is 10 -10m.

Answer

The wave length of radio rays is 106m

Answer

The visible length occupies a small portion of the electromagntic spectrum extending roughly from 0.4p.m to 0.7pm wave length.

Question 2

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

Accepted Answer

All of these

Answer

Ultraviolet frequency region

Answer

Visible frequency region

Answer

Infrared frequency region

Question 3

The maximum sun's radiation occurs around:

Accepted Answer

0.55 pm wave length

Answer

0.4 pm wave length

Answer

0.7 pm wave length

Answer

None of these

Question 4

All bodies at temperatures above absolute zero degree emit electromagnetic radiation at different wave length, is known as:

Accepted Answer

Plank's law

Answer

Planktan's law

Answer

Lambert's cosine law

Answer

None of these

Question 5

Which one of the following statements is correct?

Accepted Answer

All of these

Answer

During the day, earth reflects solar radiation

Answer

During the day earth reflects both solar radiation the emission from its surface

Answer

During the night, earth emits radiation from its surface

Question 6

Which one of the following is incorrect statement? While passing through the atmosphere, the solar radiation,

Accepted Answer

remains unaffected

Answer

gets scattered

Answer

gets absorbed partially

Answer

None of these

Question 7

The maximum absorption of solar radiation due to ozone occurs at wave lengths:

Accepted Answer

shorter than 0 3 pm

Answer

shorter than 0.2 pm

Answer

greater than 0.3 pm

Answer

None of these

Question 8

The remote sensing techniques applied for the earth's surface features, is generally confined to the following wave lengths :

Accepted Answer

All of these

Answer

0.4 to 1.3 1.5 to 1.8, 2.2 to 2.6 gm

Answer

2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 pm

Answer

4.2 to 5.0, 7.0 to 15.0 gm and 1 cm to 30 cm

Question 9

Pick up the correct statement from the following :

Accepted Answer

All of these

Answer

Atmospheric windows are the spectral regions of the electromegnetic radiation through which they pass without much attenuation.

Answer

The scattered/diffused radiance entering the field of view of a remote sensor other than that from the required target, is called path radiance

Answer

The difference between the apparent radiance of the ground targets and intrinsic surface radiance, is termed as radiometric error