Because, it is cold at higher altitudes. Air hits the leading edge and flows through the upper and lower part of wings. Because relative velocity is zero, then there are stagnation points in leading edges. Water droplets presented in clouds cannot flee from these stagnation points, as it's density is more than air. And droplets stick to the leading edge and freeze.
the air is extremely cold and the plane is going really fast. just like if you run when your face is wet and then your face gets cold. or when you stick your head out your car window while riding in a car, your face will get cold. hope this help.:)
Cirrus clouds.
The three main altitudes of clouds are low clouds, which are typically found below 6,500 feet; middle clouds, which are usually between 6,500 and 20,000 feet; and high clouds, which are typically above 20,000 feet. These altitudes can vary depending on the specific cloud types and weather conditions.
up high!
Cirrus clouds are comprised of ice crystals so they are found at high altitudes.
The cirrus clouds, cirrocumulus clouds, cirrostratus clouds, and cumulonimbus clouds.
just high altitudes
Cirrus
alto
yes
no
Lacy clouds that form at high altitudes are cirrus clouds. These types of clouds usually form before there is a change in weather. These clouds form above 20,000 feet, and they indicate fair weather.