Consider the following phenomenon 1 Size of the Sun at dusk 2 Colour of the Sun at dawn 3 Moon...........

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Consider the following phenomenon:

1. Size of the Sun at dusk.

2. Colour of the Sun at dawn.

3. Moon being visible at dawn.

4. Twinkle of stars in the sky.

5. Polestar being visible in the sky

Which of the above are optical illusions?

1, 2 and 3

3, 4 and 5

1, 2 and 4

2, 3 and 5

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Explanation:

Optical illusions occurs due to the presence of atmosphere on planet earth due to which light coming from several light years far, in atmosphere goes through scattering, bending, refraction and even absorption due to which several illusions occurs, like blue colour of oceans, size of sun at dusk, twinkling of stars, etc.