Correct Option
On June 21, the Northern Hemisphere experiences its summer solstice, being maximally tilted towards the Sun. The Sun's rays are directly overhead at the Tropic of Cancer (23.5° N latitude). Due to this tilt, regions within the Arctic Circle (approximately 66.5° N latitude) receive continuous sunlight for 24 hours, meaning the Sun does not set below the horizon. This phenomenon is known as the 'Midnight Sun'.
Incorrect Options
- On June 21, the Southern Hemisphere is tilted away from the Sun. Consequently, the Antarctic Circle (approximately 66.5° S latitude) experiences 24 hours of darkness, not continuous daylight.
- The Sun shines vertically overhead at the Equator only during the equinoxes (around March 21 and September 23), when the Earth's axis is neither tilted towards nor away from the Sun. On June 21, the vertical rays are at the Tropic of Cancer.
- The Sun shines vertically overhead at the Tropic of Capricorn (23.5° S latitude) during the winter solstice in the Northern Hemisphere, which occurs around December 21. On June 21, the vertical rays are at the Tropic of Cancer.