ATTEMPT · SCIENCE & TECHNOLOGY · PRELIMS 2013

Consider the following phenomena: 1. Size of the sun at dusk 2. Colour of the sun at dawn 3. Moon being visib…

Read the full question, pick an option, then see whether you were right. The answer is not shown until you attempt.

Your attempt

Choose an option before the answer.

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?

Pick an option to check yourself. The answer stays hidden until you attempt.

Keep attempting in GyanGram.

Filter by year or subject, attempt previous-year questions, and connect each miss back to a visual deck.