ELEMENTS OF REMOTE SENSING QUIZ

The infrared portion of EMR lies between

0.5 mm to 1 μm

0.7 - 1.3 μm

0.7 to 14 μm

0.4 - 0.7 μm

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:

None of these

Passive remote sensing

Active remote sensing

Neutral remote sensing

TRUE ANSWER : ?
YOUR ANSWER : ?

Electromagnetic spectrum contains:

Ultraviolet rays (wave length < 10⁻⁶ m)

Infrared rays (wave length < 10⁻⁴ m)

Gamma rays (wave length < 10⁻¹⁰ m)

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Visible (0.4 - 0.7 μm) region

None of these

Short wave-IR (1.3 - 2.7 μm) region

Near-IR (0.7 - 1.3 μm) region

TRUE ANSWER : ?
YOUR ANSWER : ?

The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called:

Passive sensors

Active sensors

None of these

Sensors

TRUE ANSWER : ?
YOUR ANSWER : ?

Which one of the following relationship between the wave length (λ), and frequency and the speed (C) of the electromagnetic wave is correct?

C = v + λ

C = 1/λv

C = vλ

C = λ/v

TRUE ANSWER : ?
YOUR ANSWER : ?

Which one of the following statements regarding remote sensing is correct?

The interaction of the electromagnetic radiation with the target

The emission of electromagnetic radiation from the target

Neither (A) nor (B)

Both (A) and (B)

TRUE ANSWER : ?
YOUR ANSWER : ?

A reduction of nitrogen nutrient in plants:

All of these

Affects leaf color

Reduces pigment concentration

Increase the visible reflectivity

TRUE ANSWER : ?
YOUR ANSWER : ?

For interpolation of satellite data used for monitoring dynamic changes that occurs on the earth surface, the most suitable orbit for the satellite is:

Sun-synchronous orbit

None of these

Circular orbit

Near polar orbit

TRUE ANSWER : ?
YOUR ANSWER : ?

Orbital radius of GPS satellites is approximately:

26,600 km

15,200 km

18,400 km

36,000 km

TRUE ANSWER : ?
YOUR ANSWER : ?

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