ELEMENTS OF REMOTE SENSING QUIZ

"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:

Snell's law

Fresnel refraction

None of these

Fresnel reflection

TRUE ANSWER : ?
YOUR ANSWER : ?

The GPS space segment consists of Navigation Satellite Timing and Ranging whose number is :

24

16

8

12

TRUE ANSWER : ?
YOUR ANSWER : ?

According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n₁) on another medium (refractive index m₂);

The angle of refraction (θr) is given by sin θ₂ = (n₁/n₂) sin θi

The angle of incidence is equal to the angle of refraction

Both (A) and (B)

Neither (A) nor (B)

TRUE ANSWER : ?
YOUR ANSWER : ?

Electromagnetic spectrum contains:

Infrared rays (wave length < 10⁻⁴ m)

All of these

Ultraviolet rays (wave length < 10⁻⁶ m)

Gamma rays (wave length < 10⁻¹⁰ m)

TRUE ANSWER : ?
YOUR ANSWER : ?

The various stages occuring in GPS system are described below: 1. Generation of an output to the user 2. Detection of the GPS signals 3. Processing the data in the built-in-computer 4. Decoding the GPS signal.The correct sequence of the stages is:

2, 3, 4, 1

1, 2, 3, 4

3, 1, 2, 4

2, 4, 3, 1

TRUE ANSWER : ?
YOUR ANSWER : ?

The normal altitude of GPS satellite is about

36,100 km

24,400 km

16,200 km

20,200 km

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Black hole

Ozone window

Ozone hole

Atmospheric window

TRUE ANSWER : ?
YOUR ANSWER : ?

A passive sensor uses:

Flash light as a source of energy

None of these

Sun as the source of energy

Its own source of energy

TRUE ANSWER : ?
YOUR ANSWER : ?

Which one of the following attributes is not associated with digital maps

South arrow

Legends

Color

Symbology

TRUE ANSWER : ?
YOUR ANSWER : ?

The interaction of the electromagnetic radiation produced with a specific wave length to illuminate a target on the terrain for studying its scattered radiance, is called:

Passive remote sensing

None of these

Active remote sensing

Neutral remote sensing

TRUE ANSWER : ?
YOUR ANSWER : ?

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