The sunlight is available 24 hours on the longest day at

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The sunlight is available 24 hours on the longest day at which of the following latitudes of the earth ?

1. 49°
2. 66 1 °
  2
3. 63°
4. 69°51'

Correct Option: B

During the June solstice the Earth’s North Pole is tilted 23.5 degrees towards the Sun relative to the circle of illumination. This phenomenon keeps all places above latitude of 66.5 degrees N in 24 hours of sunlight, while locations below latitude of 66.5 degrees are in darkness.