ELEMENTS OF REMOTE SENSING QUIZ

Coherence of two electromagnetic waves takes place if their phase difference is:

Constant in time and space

Constant in space

Constant in time

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

DGPS is based on the concept that bias errors in the position of locations in a given local area, are same if their distances are within

75 km

50 km

25 km

100 km

TRUE ANSWER : ?
YOUR ANSWER : ?

The reflectance from a surface is called specular reflection if it follows:

Planktan

Snell’s law

Lambert

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Which one of the following factors does not affect the scale of the air photographs?

None of these

Focal length

Ground elevation

Flying height

TRUE ANSWER : ?
YOUR ANSWER : ?

While propagating through homogeneous, isotropic media,

Neither (A) nor (B)

Directions of both the fields are orthogonal

Both the fields are at right angles to the direction of propagation

Both (A) and (B)

TRUE ANSWER : ?
YOUR ANSWER : ?

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

2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 μm

0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 μm

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

All of these

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:

Active sensors

Passive sensors

None of these

Sensors

TRUE ANSWER : ?
YOUR ANSWER : ?

Which one the following is a correct statement?

The transitional layer between two adjoining horizons is called boundary

All of these

The layers of the soil parallel to the earth surface are called horizons

The vertical section of the soil extending into the parent material, is called profile

TRUE ANSWER : ?
YOUR ANSWER : ?

Formation of snow occurs if the cloud temperature is

None of these

At the freezing point

Below the freezing point

Just above the freezing point

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Scan skew

Altitude variation

Earth rotation

Panoramic distortion

TRUE ANSWER : ?
YOUR ANSWER : ?