Multiple choice

What part of the electromagnetic spectrum can be directly observed by humans?

  1. Visible light

  2. Ultraviolet light

  3. Radio waves

  4. Gamma rays
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Human eyes contain specialized photoreceptor cells (rods and cones) that are sensitive only to a narrow band of electromagnetic radiation. This specific range is known as visible light, whereas other wavelengths like ultraviolet, radio waves, and gamma rays cannot be detected directly by human vision.

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