Why is the greenhouse effect only one way?

Question

So what I’m reading is that these gas absorb the light from the sun and keeps it trapped on the earth.

What I don’t get is how is it letting the light and heat in from the sun in, but not the light and heat reflected from the Earth out? If it’s a barrier, shouldn’t it block both ways? If it’s not a barrier, how is it trapping the heat?

In: 950

Answer 1

Light has frequency when coming in, hitting the earth and warming it. Earth then emits Light with much lower frequency. The one with the higher moves through greenhouse gases when coming in, the one with the lower gets trapped in. Like it got all the motivation and focus when coming in, and when going out it does not. Like In a swamp.