Answer: During winter the Northern Hemisphere leans away from the sun, there are fewer daylight hours and the sun hits us at an angle. This makes it appear lower in the sky. In equatorial regions the length of days and the directness of sunlight don't change as much.
Hope this helps :)
X-Ray used to Take images of teeth and bones.
Ultraviolet night vision goggle
It will melt or the molecules inside of it will get hot