Question

why are sun rays never vertical on the arctic circle

Answer 1

because Arctic Circle is not straight to the sun rays.so they must be striaght up to sun rays then only sun rays can reach them vertically.but they r not straight so sun rays e bro vertical.

Answer 2

The sun rays are never vertical on the arctic circle because :

* the Earth is tilted  by 23.5 degrees

* because of the Earth is tilted it only allow the sun rays to fall overhead in between the Tropic of Cancer and the Tropic of Capricorn, in a result the sun rays are never vertical in the arctic circle ( at any time of the year)