Q. At which of the following periods ‘Diamond Ring’ phenomenon is observed?
Answer: only along the peripheral regions of the totality trial
Notes: The diamond-ring basically effect occurs at the beginning and end of totality during a total solar eclipse. As the last bits of sunlight pass through the valleys on the moon's limb, and the faint corona around the sun is just becoming visible, it looks like a ring with glittering diamonds on it.

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