Chapter 7 Introduction To Remote Sensing | NCERT Important MCQs for  Class 11th Geography : Practical Work in Geography

1. Choose the right answer from the four alternatives given below

Question 1(i).
Remote sensing of objects can be done 1 through various means such as A. remote sensors, B. human eyes and C. photographic system. Which of the following represents the true order of their evolution?
(a) ABC
(b) BCA
(c) CAB
(d) None of the above
Answer:
(b) BCA

Question 1(ii).
Which of the following regions of r Electromagnetic spectrum is not used in satellite remote sensing?
(a) Microwave region
(b) Infrared region
(c) X-rays
(d) visible region
answer:
(c) X-Rays

Question 1(iii).
Which of the following is not used in visual interpretation technique?
(а) Spatial arrangements of objects
(b) Frequency of tonal change on the image
(c) Location of objects with respect to other objects
(d) Digital image processing
Answer:
(a) Spatial Arrangement of Objects

Class 11 Practical Work in Geography Chapter 7 Multiple Choice Questions

Question 1.
The range of the wavelengths in the continuous spectrum such as the green band ranges from 0.5 to 0.6 p and the range of NIR band 0.7 to 1.1 p. What is it called?
(a) Sensor
(b) False Colour Composite
(c) Spectral Band
(d) Electro-Magnetic Spectrum
Answer:
(c) Spectral Band

Question 2.
The ground area covered by an image or a photograph is called:
(a) Band
(b) Digital Image
(c) Scene
(d) Spectrum
Answer:
(c) Scene

Question 3.
The ratio of the radiant energy reflected by a substance to the energy it receives is called:
(a) Reflectance
(b) False Colour Composite
(c) Spectral Band
(d) Electro Magnetic Spectrum
Answer:
(a) Reflectance

Question 4.
When was the term remote sensing used for the first time?
(a) Early 1950s
(b) Early 1960s
(c) Early 1970s
(d) Early 1980s
Answer:
(b) Early 1950s

Question 5.
What is the most important source of remote sensing?
(a) Sun
(b) Generator
(c) Electronic Appliances
(d) Flash Gun
Answer:
(a) Sun

Question 6.
What is the mode of collection of images by scanners called?
(a) Sensing
(b) Satellite images
(c) Bit-by-bit.
(d) Electromagnetic images
Answer:
(c) Bit-by-bit

Question 7.
The principle that is utilised in obtaining Multispectral Images:
(а) Dispersion of Light
(б) Rainbow Principle
(c) Prism Principle
(d) Spectral Band
Answer:
(a) Dispersion of light

Question 8.
The continuum of electromagnetic radiation that ranges from short wave high frequency cosmic radiations to long
wavelength low frequency radio waves is called:
(a) Reflectance
(b) False Colour Composite
(c) Spectral Band
(d) Electro Magnetic Spectrum
Answer:
(d) Electro Magnetic Spectrum

Question 9.
A digital image consists of discrete picture elements called:
(a) Photographic Shadow
(b) Pixel
(c) Digital Number
(d) Algorithm
Answer:
(b) Pixel

Question 10.
There is an artificially generated colour image in which blue, green and red colours are assigned to the wavelength regions to which they do not belong in nature. It is called:
(а) Sensor
(b) False Colour Composite
(c) Spectral Band
(d) Electro Magnetic Spectrum
Answer:
(b) False Colour Composite