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The picture shows Lili's child standing in front of mirror glass and ground glass. Please observe carefully and tell the implied physical knowledge. (at least tell.
As can be seen from the figure,

① One is specular reflection and the other is diffuse reflection;

(2) When the mirror image is formed, a virtual image with the same vertical size will be formed, and the image distance is equal to the object distance;

Diffuse reflection doesn't image, but it reflects light in all directions, so Lily's children stand in front of frosted glass and don't see her image.

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