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Atmospheric remote sensing > FINAL QUESTIONS > Flashcards

FINAL QUESTIONS Flashcards

1
Q
  • It’s important to restrict the light entering the camera by use ;
    a) color filter
    b) overlap
    c) filters
    d) film
A

C

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2
Q

consists of oscillating electric and magnetic fields that propagate through space along a liner path and with a constant velocity.

a) electromagnetic radiation
b) electric field
c) polarization
d) phosphorescence

A

A

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3
Q

a spectral line is a dark or bright line in otherwise uniform and continues spectrum results of;

a) transition
b) absorption and emissions
c) transition and emissions
d) absorption

A

B

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4
Q

if no energy absorbed by the material, it is said to be ;

a) absorption
b) transition
c) radiation
d) reflection

A

B

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5
Q
  • it absorb all wavelength of long wave infrared radiation well ;
    a) ozone
    b) oxygen
    c) clouds
    d) gases
A

C

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6
Q

measurements of polarization are activity used in ;

a) electromagnetic radiation
b) solar and microwave regions
c) UV and infrared regions
d) microwave region

A

B

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7
Q

law that states the emissivity of a medium is equal to the absorptivity of this medium under thermodynamic equilibrium;

a) wien’s displacement law
b) kirchff’s law
c) Stefan-Boltzmann law
d) plank function

A

B

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8
Q

the temperature of a black body that emits the same intensity as measured at a given wave length ;

a) Brightness temperature
b) temperature
c) plank function
d) blackbody

A

A

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9
Q

. Lenses and geometry of light retrieval in a camera are referred to as:
A) lenses
B) optics
C) spectra
D) film

A

B

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10
Q

There are several things you can look for to determine what makes one photograph different from another of the same area, one of them is:
A) color
B) material
C) zooming
D) overlap

A

D

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11
Q

Before light reflected from an objects strikes the film, it must pass through:
A) one or more lenses
B) one or more film records
C) a shutter
D) a durable base

A

A

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12
Q

As light passes through a lens it is …………… to focus the images object on the film.
A) refracted
B) bent
C) absorbed
D) emitted

A

B

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13
Q

Most camera lenses are composed of multiple lenses in order to:
A) take multiple images at a time
B) give instant images
C) to create colored images
D) minimize distortion

A

D

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14
Q

Fast film requires ……… than slow film to record the same image.
A) less light
B) more light
C) smaller shutter
D) larger shutter

A

A

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15
Q

Faster film speed results in:
A) better image quality
B) clearer images
C) grainer images
D) colorful images

A

C

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16
Q

The amount of image detail that can be recorded on film is directly related to:
A) the focal length
B) the size of the lens
C) the quality of the film
D) the distance between the lens and the shutter

A

A

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17
Q

Filters that work by absorbing a range of wavelengths while allowing others to pass through are known as:
A) neutral color filters
B) color filters
C) anti-haze filters
D) yellow filters

A

B

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18
Q

The small registration marks exposed on the edges of a photograph are known as:
A) registration marks
B) topographic marks
C) fiducial marks
D) exposure marks

A

C

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19
Q

what are the main two types of interactions between an electromagnetic radiation field and a medium

a. extinction and absorption
b. absorption and scattering
c. extinction and emission
d. none of the above

A

C

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20
Q

. process that increase the radiative intensity:

a. absorption
b. scattering
c. emission
d. attention

A

C

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21
Q

. process that decreases the radiative intensity:

a. absorption
b. scattering
c. emission
d. attenuation

A

D

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22
Q

. all bodies that have a temperature above absolute zero often refers to:

a. absorption
b. scattering
c. thermal emission
d. attenuation

A

C

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23
Q

process of removing the radiative energy from an electromagnetic field and transfers it to other forms of energy:

a. absorption
b. scattering
c. emission
d. attenuation

A

A

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24
Q

. extinction is due to

a. absorption
b. emission
c. absorption and scattering
d. all of the above

A

C

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25
Q

process that does not remove energy from radiative field, but may redirect it:

a. absorption
b. scattering
c. thermal emission
d. attenuation

A

B

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26
Q

. when the scattered radiation is the same as the frequency as that of the incident field is called

a. inelastic scattering
b. elastic scattering
c. thermal emission
d. none of the above

A

B

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27
Q

body that absorbs all radiation incident upon it is called

a. white body
b. black body
c. pink body
d. none of the above

A

B

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28
Q

. which of the following is incorrect about the black body properties?

a. radiation emitted by a blackbody is isotropic, homogeneous and unpolarized
b. blackbody radiation at a given wavelength depends only on temperature
c. any two blackbodies at the same temperature emit the same radiation
d. a blackbody emits less radiation than any other type of an object at the same temperature

A

D

29
Q

. it gives the intensity emitted by a blackbody having a given temperature

a. planck function
b. wein’s law
c. kirchooff’s law
d. none of the above

A

A

30
Q

. planck function can be expressed as

a. wavelength
b. frequency
c. wavenumber
d. all of the above

A

D

31
Q

states that the radiative flux emitted by a blackbody, pr unit surface area of the blackbody, varies as T4:

a. planck function
b. wein’s law
c. Stefan Boltzmann law

A

C

32
Q

The processes of collecting information about Earth surfaces and phenomena using sensors not in physical contact with the surfaces and phenomena of interest ?

a) Electromagnetic Radiations
b) Resolution
c) Remote sensing
d) Earth’s rotation

A

C

33
Q

The earth surface area covered by a pixel of an image is known as;

a) Spatial Resolution
b) spectral resolution
c) Temporal resolution
d) Radiometric resolution

A

A

34
Q

More number of bands in a specified bandwidth means ;

a) low spectral Resolution
b) higher spectral resolution
c) low spatial resolution
d) Radiometric resolution

A

B

35
Q

Sensitivity of the sensor to the magnitude of the received electromagnetic energy determines to ;

a) Spatial Resolution
b) spectral resolution
c) Temporal resolution
d) Radiometric resolution

A

D

36
Q

Frequency at which images are recorded/ captured in a specific place on the earth.

a) Radiometric resolution
b) Temporal resolution
c) spectral resolution
d) Spatial Resolution

A

B

37
Q
  1. Ozone(O3 )….
    a) Absorbs a little LWIR radiation
    b) Absorbs most of the UV radiation from the sun
    c) a and b
    d) Absorbs no radiation
A

C

38
Q
  1. Sky is blue because molecules in the air ………….. blue light in all directions.
    a) reflect
    b) scatter
    c) transmit
    d) absorb
A

B

39
Q
  1. Oxygen(O2) absorbs ..
    a) little IR
    b) longwave radiation
    c) microwave radiation
    d) little UV
A

D

40
Q
  1. Without ………… these wavelength emitted by the earth’s surface escape to space ,while most other wavelength are absorbed.
    a) aerosols
    b) clouds
    c) sun
    d) gases
A

B

41
Q
  1. Air scatters mostly just …………… from the sun.
    a) UV and visible light
    b) IR and visible light
    c) microwave and IR
    d) UV and IR
A

A

42
Q
  1. Gases that absorb no radiation are ..
    a) ozone and oxygen
    b) nitrogen andargon
    c) carbon and oxygen
    d) oxygen and water vapor
A

B

43
Q
  1. Air is …….. percent nitrogen.
    a) 70
    b) 21
    c) 87
    d) 78
A

D

44
Q
  1. clouds absorb all wavelengths of ………….. radiation well.
    a) shortwave
    b) longwave
    c) longwave and shortwave
    d) none of the above
A

B

45
Q
  1. Which one of these is not a type of attributes used to indicate the use of particular sensors?
  2. Distance the sensor is from the object of interest
  3. Size of the sensor
  4. Timing of image acquisition
  5. Location and extend of coverage
A

B

46
Q

One of common ground base devices is ……….

A) helicopter

B) shuttle

D) hand-held

C)airplane

A

D

47
Q

An example for field remote sensing instrument used in meteorology is ………….. ,which is a fleet of radar trunks .

A) tripod

B) Doppler in wheels

C) cranes

D) towers

A

B

48
Q

The best example fro permanent ground platform used for monitoring atmospheric phenomena is ………..

A) towers

B) tripod

C) radar

D)airplane

A

C

49
Q

The categories of the aircraft is divided based on their ……………. .

A) latitude

B) altitude restriction

C) composition of airplane

D) speed of aircraft

A

B

50
Q

What type of aircraft that have an altitude limit under 30 000 feet above mean sea level ?

A) high altitude

B) standard altitude

C) mid-latitude

D) low altitude

A

C

51
Q

The most stable platform aloft is satellite , which is ……….. ?

A) shuttle

B) aircraft

C) space borne

D) towers

A

C

52
Q

Both …………… and ……………. Are orbits around the earth matching earth’s sidereal rotation period.

A) GSO AND LEO

B) MEO AND GEO

C) GSO AND GEO

D) HEO AND MEO

A

C

53
Q

Complete the following orbital types according to the altitude :

  1. LE0 , MEO , GEO , HEO
  2. MEO, GEO ,HEO ,LEO
  3. GEO , LEO , HEO , MEO
  4. GEO , HEO , MEO , LEO
A

A

54
Q

Sensor that emits energy then measures the return of the energy after it has interacted with a surface is …………. .

A) passive

B) active

C) non imaging

D) imaging

A

B

55
Q

Images produced from remote sensing data can either be ………… or …………. .

A) imaging or non imaging

B) analog or digital

C) passive or active

B) manual or remotely

A

B

56
Q

What is the atmospheric effect that alter the signals of the passive sensor ?

A) absorption by atmosphere

B) scattered by atmosphere

C) emitted by atmosphere

D) transmitted by atmosphere

A

B

57
Q

The components of a microwave radiometer are ……. , …….., and ……… .

A) filters , prisms and sophisticated techniques

B) radiometer , detector and lens

C)antenna , receiver and recording

D) satellite , radar and lidar

A

C

58
Q

The simplest LIDAR system measures …….. , ….. And ………. .

  1. Elevation , slope and roughness of land , ice or water surfaces
  2. Friction , color and slope
  3. Roughness , friction and slope

Brightness , slope and roughness

A

A

59
Q

…………. Is the process where a material absorbs radiant energy at one wavelength and then emits it at a different wavelength without first converting the absorbed energy into thermal energy.

  1. Passive microwave systems
  2. Photographic
  3. Electro-optic radiometer
  4. Fluorescence
A

D

60
Q
  1. In the following image A, B, C, D represents
    a. magnetic field, electric field, , A
    b. magnetic field, electric field, A,
    c. electric field, magnetic field , A
    d. electric field, magnetic field, A,
A

B

61
Q
  1. Optics describe
    a. the general laws of reflection
    b. the general laws of transmission
    c. the general laws of absorption
    d. the general laws of electromagnetic radiation
A

A

62
Q
  1. Radiation undergoes refraction when
    a. oscillating electric and magnetic fields propagate through space along a linear path and with a constant velocity.
    b. electromagnetic radiation is transmitted completely through the substance it encounters
    c. it passes from one medium to another
    d. the material is perfectly transparent
A

C

63
Q
  1. Lead glass is transparent to
    a. Ultraviolet
    b. visible light
    c. infrared
    d. X-rays
A

B

64
Q

. ……………………… is perfectly transparent

a. glass
b. water
c. all kinds of materials
d. No known material

A

D

65
Q

some properties of electromagnetic radiation, such as its refraction when it passes from one medium to another, which is explained best by

a. describing light as a wave
b. describing light as a particle
c. describing light as a transparent medium
d. describing light as a photon

A

A

66
Q

An electromagnetic wave is not characterized by:

a. phase angle
b. wavelenght
c. polarization
d. direction of propagation

A

B

67
Q

. for ultraviolet and visible electromagnetic radiation. The wavelength is usually expressed in

a. micrometer
b. millimeter
c. microns
d. nanometers

A

D

68
Q

the following represent

a. absorption
b. emission
c. photoionization
d. Compton scattering

A

B

69
Q
  1. transitions between energy levels doesn’t occur by
    a. absorption
    b. emission
    c. stimulated absorption of photons
    d. stimulated emission of photons
A

C

Atmospheric remote sensing (9 decks)

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