Consider the following phenomena: 1. Size of the sun at dusk 2. Colour of the sun at dawn 3. Moon being visib…
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Consider the following phenomena:
1. Size of the sun at dusk
2. Colour of the sun at dawn
3. Moon being visible at dawn
4. The twinkle of stars in the sky
5. Polestar being visible in the sky
Which of the above are optical illusions?
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• Correct Answer: C
• Sun appearing larger at horizon (Moon illusion), red colour at dawn (Rayleigh scattering perception), and star twinkling (atmospheric scintillation) are optical phenomena.
• Moon visible at dawn is real astronomical positioning; Polestar visibility is real due to axial alignment.
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