Question

What is the name given to the type of electromagnetic waves used to capture photographs of earth in foggy conditions?

• A. Visible rays
• B. UV rays
• C. Microwaves
• D. Infrared rays

Hint:

Infrared radiation is widely used in remote sensing and photography, especially in conditions with poor visibility like fog or smoke.

Answer 1

The Correct Option is D

Step 1: Understanding the concept.
Infrared rays are electromagnetic waves that have longer wavelengths than visible light and can penetrate fog, smoke, and other obstructions better than visible light. This makes them ideal for capturing photographs of the earth in foggy conditions.
Step 2: Analyzing the options.
(1) Visible rays: This is incorrect. Visible light is not effective in foggy conditions because it cannot penetrate through fog and other obstructions easily.
(2) UV rays: This is incorrect. UV rays are used for other purposes, such as sterilization, and are not suitable for capturing photographs through fog.
(3) Microwaves: This is incorrect. While microwaves can penetrate obstacles, they are not typically used for photographic imaging.
(4) Infrared rays: Correct. Infrared rays can penetrate fog and other obstructions, making them ideal for capturing images of the earth in such conditions.
Step 3: Conclusion.
The correct answer is (4) Infrared rays, as they are used for capturing photographs in foggy conditions.