Multiple choice

Which of the following electromagnetic radiation is used for viewing the objects through haze and fog?

  1. Radio rays

  2. Ultraviolet rays

  3. X-rays

  4. Infrared rays
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Infrared rays have longer wavelengths than visible light and can penetrate haze, fog, and smoke more effectively because they scatter less than visible light. This makes infrared radiation useful for thermal imaging, night vision, and surveillance applications. Radio waves also penetrate but lack the resolution for clear viewing. UV and X-rays are more strongly scattered.

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