Physics problem Xiao Hao's family bought a car, and carefully he found that the front windshield was obliquely dressed.

In order to ensure the safety of driving at night. The front windshield of a car is installed obliquely, because the light from the vehicle behind shines on the front windshield and reflects obliquely downward; When the scene inside the car is illuminated, the image formed by the front windshield is located diagonally above the driver. In this way, the driver in the car will not be disturbed by the reflected light.