·······························一盏探照灯装在东面的看台上,灯光朝西斜向下投射到有水的游泳池底的中央,在将水逐渐灌满的过程中,池底的光斑将( )A,向东移动后静止B.向

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·······························一盏探照灯装在东面的看台上,灯光朝西斜向下投射到有水的游泳池底的中央,在将水逐渐灌满的过程中,池底的光斑将( )A,向东移动后静止B.向
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一盏探照灯装在东面的看台上,灯光朝西斜向下投射到有水的游泳池底的中央,在将水逐渐灌满的过程中,池底的光斑将( )
A,向东移动后静止
B.向西移动后静止
C,先向东移动后向西移动.
D,仍在原位

·······························一盏探照灯装在东面的看台上,灯光朝西斜向下投射到有水的游泳池底的中央,在将水逐渐灌满的过程中,池底的光斑将( )A,向东移动后静止B.向
答案是A
光到水面的入射点在右移
所以光斑在右移
水不断升高 光斑一直右移
光斑不断接近入射点的垂直面对应的游泳池底的点并且只能接近而不能超过
所以此时光斑静止
画图会有助于你的理解 公式 n=sin A/sin B

选C 画一下图吧 就知道了

A

b

A 光的折射

B

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