Deck 10: How Remote Sensing Works

Question 1

Energy that is trapped an held by a surface has been

A)transmitted.
B)absorbed.
C)reflected.
D)incidented.

Answer 1

B

Question 2

The energy range of 0.7 to 1.3 micrometers defines which of the following types of energy?

A)Red
B)Near infrared
C)Middle infrared
D)Thermal infrared

Answer 2

B

Question 3

Placing the green band in the blue color gun,the red band in the green color gun,and the near-infrared band in the red color gun will create which type of composite image?

A)True color
B)Spectral color
C)False color
D)Standard false color

Answer 3

D

Question 4

Smoke and pollen cause what type of scattering in the atmosphere?

A)Spectral scattering
B)Nonselective scattering
C)Rayleigh scattering
D)Mie scattering

Question 5

A pixel of an image displayed on a screen that has a brightness value of 127 in the red color gun,127 in the green color gun,and 127 in the blue color gun will produce which color for that pixel?

A)Black
B)White
C)Grey
D)No color will be produced with this combination.

Question 6

Sensing in the "green" portion of the EM spectrum means sensing energy wavelengths of

A)0.7 $\mu$ m-0.98 $\mu$ m.
B)0.4 $\mu$ m-0.5 $\mu$ m.
C)0.6 $\mu$ m-0.7 $\mu$ m.
D)0.5 $\mu$ m-0.6 $\mu$ m.

Question 7

NDVI is primarily used to determine

A)health of vegetation.
B)amount of urban area.
C)soil characteristics.
D)water absorption.

Question 8

Which of the following forms of electromagnetic energy has the shortest wavelength?

A)Ultraviolet light
B)Near-infrared light
C)Radio waves
D)Microwaves

Question 9

A narrow range of wavelengths describes a

A)band.
B)frequency.
C)electromagnetic spectrum.
D)nanometer.

Question 10

Placing the blue band in the blue color gun,the green band in the green color gun,and the red band in the red color gun will create which type of composite image?

A)Spectral color
B)Standard false color
C)False color
D)True color

Question 11

An 8-bit sensor can produce what range of brightness values?

A)0-7
B)0-8
C)0-64
D)0-255

Question 12

A charted identifier for an feature based on its reflectance of different wavelengths of energy is a

A)spectral reflectance.
B)spectral signature.
C)spectral incidence.
D)spectral scattering.

Question 13

Describe the relationship between frequency and wavelength (of radiated waves of electromagnetic energy),and explain why they have this relationship.

Question 14

An atmospheric window is best described as

A)a hole in the atmosphere (such as the ozone layer)that lets electromagnetic energy through to the Earth.
B)a wavelength of energy that is most easily transmitted to the Earth.
C)a wavelength of energy that is nearly 100% absorbed by the atmosphere.
D)the "thin" areas of the atmosphere that allow for the maximum amount of ultraviolet energy to pass through to the planet.

Question 15

Describe the steps in the remote sensing process,starting with the sun as a source of energy and ending with the energy being received at a sensor (so it can be converted into an image).

Question 16

Which of the following forms of electromagnetic energy has the shortest frequency?

A)Gamma rays
B)X-rays
C)Infrared light
D)Radio waves

Question 17

A remote sensing device simultaneously measuring seven bands of energy wavelengths would be capable of producing which type of imagery?

A)Panchromatic
B)Multispectral
C)Hyperspectral
D)Ultraspectral

Question 18

We see the sky as blue in the middle of the day because of

A)nonselective scattering.
B)atmospheric transmittance.
C)Rayleigh scattering.
D)atmospheric absorption.

Question 19

Molecular level particles that cause scattering in the atmosphere are an example of

A)Mie scattering.
B)Rayleigh scattering.
C)nonselective scattering.
D)Spectral scattering.

Question 20

Our eyes are sensitive to viewing which wavelengths of light?

A)0.3 $\mu$ m-0.9 $\mu$ m
B)0.4 $\mu$ m-0.7 $\mu$ m
C)0.1 $\mu$ m-1.0 $\mu$ m
D)0.7 $\mu$ m-0.9 $\mu$ m