Which of the following regions of Electromagnetic spectrum is not used in satellite remote sensing.
Explanation
Option (C) X-rays is the correct answer. The textbook explicitly states that 'the visible, infrared and microwave regions of energy are used in remote sensing.' While the electromagnetic spectrum includes Gamma rays, X-rays, Ultraviolet rays, Visible rays, Infrared rays, Microwaves and Radio waves, only the visible, infrared and microwave regions are utilized in remote sensing applications. Therefore, X-rays are not used in satellite remote sensing.
Solution Steps
Step 1: Identify the regions of electromagnetic spectrum mentioned in the text - Gamma, X-rays, Ultraviolet rays, Visible rays, Infrared rays, Microwaves and Radio waves.
Step 2: Note the specific statement: 'the visible, infrared and microwave regions of energy are used in remote sensing.'
Step 3: Compare the options with the statement - Visible (used), Infrared (used), Microwave (used), X-rays (not mentioned as used).
Step 4: Conclude that X-rays is the region not used in satellite remote sensing.