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How does the two-way mirror in the interrogation rooms work?

with a two-way mirror, the inner person cannot look outside but the outside person can observe the inner space. why can two-dimensional mirrors be able to do so?

It turns out this is the reason why seawater is often blue but the waves are white

glenn smith, a professor at the georgia institute of technology, in the united states, actually has no color, but because it reflects the blue of the sky, when we see them green.

Strange black planet 'swallowed' 94% of light

wasp-12b is a new, strange giant gas planet discovered by the hubble space telescope of the us aeronautics agency (nasa). it is almost black due to absorbing 94% of the light shining on the surface.