Winter bike / Snow bike thread

A quick glance at the net tells me cloudy ice has bubbles of gas in it, clear ice doesn't, so maybe neither is stronger.

When you get an ice cube out of the fridge its cloudy, translucent and sticks to the skin.
After its been out for a while it gets much clearer.

When a car window is frozen over, what does it look like? You cant see through it right? But when the window is warmed it goes clearer till it eventually melts.

These examples refer to the surface of the ice really. But in regards to the thickness of the ice. Isnt it logical that the thicker the ice is, the less light gets through making it more difficult to see underneath?

.