SSC CGL
MediumQ. No. the-human-eye-can-distinguish-approximately-how-many-colors
The human eye can distinguish approximately how many colors?
Last Updated:
A1000
B10000
C10 million
D1 billion
Correct Answer: 10 million
✅ Correct Answer: C — 10 million
The human eye can distinguish approximately 10 million (1 crore) different colors. This is possible because the retina contains three types of cone cells, each sensitive to different wavelengths of light: Red cones, Green cones, and Blue cones. The combination of signals from these three types of cones allows the brain to perceive the vast range of colors.
❌ Why other options are wrong:
• A. 1000 — 1000 colors is a massive underestimate; the human eye is far more sensitive than that.
• B. 10000 — 10,000 colors is still far too low; the true number is 10 million.
• D. 1 billion — 1 billion (100 crore) is an overestimate; the scientifically established figure is 10 million.
📝 Important Note: Retina has Rod cells (for dim light/black-and-white vision) and Cone cells (for color vision). Three types of cones: Red, Green, Blue. Color blindness occurs when one type of cone is absent/defective. The eye can distinguish ~10 million colors but only about 200 pure hues. Essential SSC CGL sense organ fact.
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