ELEMENTS OF REMOTE SENSING QUIZ

Pick up the correct definition from the following with response to GIS.

The geometric property which describes the linkage between line features is defined as connectivity

Common boundary between two areas of a locality is known as adjacency

All of these

The area features which are wholly contained within another area feature, is known so containment

TRUE ANSWER : ?
YOUR ANSWER : ?

"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:

Fresnel refraction

None of these

Snell's law

Fresnel reflection

TRUE ANSWER : ?
YOUR ANSWER : ?

Formation of snow occurs if the cloud temperature is

Below the freezing point

Just above the freezing point

None of these

At the freezing point

TRUE ANSWER : ?
YOUR ANSWER : ?

A perfectly black body:

Emits power of every wave length

All listed here

Is a diffuse emitter

Absorbs all the radiations of every wave lengths

TRUE ANSWER : ?
YOUR ANSWER : ?

The most widely used antenna in GPS is

Horn antenna

Microstrip antenna

Slotted antenna

Parabolic antenna

TRUE ANSWER : ?
YOUR ANSWER : ?

Critical angle of electromagnetic radiation takes place if

Angle of incidence is equal to angle of refraction

Angle of incidence is greater than the angle of refraction

Angle of refraction is equal to 90°

Angle of incidence is equal to 90°

TRUE ANSWER : ?
YOUR ANSWER : ?

Which one of the following statements is correct regarding the GPS satellites?

The nominal altitude is about 20,200 km

The inclination of axis satellite is 55°

All of these

The satellite transmits two L band signals (L1 with 1575.42 MHz and L2 with 1276.6 MHz)

TRUE ANSWER : ?
YOUR ANSWER : ?

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

All of these

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

0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 μm

2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 μm

TRUE ANSWER : ?
YOUR ANSWER : ?

The refractive index of the ocean water:

Increases with temperature

Decreases with temperature

Decreases with salinity

Increases with salinity

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Hertz's law

Kirchoff’s law

Faraday's law

Ampere Maxwell's law

TRUE ANSWER : ?
YOUR ANSWER : ?

↑