NCERT Class Practical Work in Geography Chapter 6 “Introduction to Remote Sensing” Solution |

Introduction to Remote Sensing

EXERCISE

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

(i) Remote sensing of objects can be done 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:

(ii) Which of the following regions of Electromagnetic spectrum is not used in satellite remote sensing.

(a) Microwave region

(b) Infrared region

(c) X – rays

(d) Visible region

Answer:

(iii) Which of the following is not used in visual interpretation technique ?

(a) 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:

2. Answer the following questions in about 30 words.

(i) Why is remote sensing a better technique than other traditional methods?

Answer:

(ii) Differentiate between IRS and INSAT series of satellites.

Answer:

(iii) Describe in brief the functioning of pushbroom scanner.

Answer:

3. Answer the following questions in about 125 words.

(i) Describe the operation of a whiskbroom scanner with the help of a diagram. Explain how it is different from pushbroom scanner.

Answer:

(ii) Identify and list the changes that can be observed in the vegetation of Himalayas (Fig.6.9).

Answer: