1提出问题人教社普通高中物理教科书第3册第21页习题5如下:为了从坦克内部观察外界目标,在坦克壁上开一个长方形.假定坦克的壁厚为20cm,孔的宽度为12cm,孔内安装一块折射率n=1.52的玻璃,厚度与坦克的壁厚相同.坦克内的人通过这块玻璃能看到的外界的角度范围为多大?与教科书配套 1 Asking questions Teacher’s College Ordinary Senior High School Physics Textbook Vol. 3 page 21 Exercise 5 is as follows: In order to observe external targets from the inside of the tank, a rectangle is formed on the tank wall. Assume that the wall thickness of the tank is 20 cm and the width of the hole is 12 cm. A glass with a refractive index n=1.52 is installed in the hole, the thickness of which is the same as the wall thickness of the tank. How large is the angle of the outside world that can be seen by people in the tank through this glass? Compatible with textbooks