Orange peel refers to the surface of the paint. OP is not smooth or flat; it is made up of 'hills and valleys', or highs and lows, in the surface of the paint. In a perfect world, the 'highs' are sanded down to be level with the 'lows', and we have a flat surface. Perfectly flat paint is rare, and some OP is 'acceptable' to manufacturers.
The 1st picture is the reflection of bare light tubes (ceiling mounted) from the flat GLASS of the windshield. Notice the crisp edges on the tubes.
The 2nd picture is the reflection THE SAME LIGHT from the hood of the Nissan Sentra. Note the 'waviness' of the tubes, and the general lack of clarity of the reflection. 
That is Orange Peel.
Jim