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Ignoring dust extinction in the answer, why is that the most distant galaxies much easier to...

Ignoring dust extinction in the answer, why is that the most distant galaxies much easier to see in infrared light than visible light?

Science   Advanced-Physics   
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The Universe is expanding. This means that from Earth, astronomers see that the most distant galaxies seem to be moving away much faster than those that are close by. As the distant galaxy travels away from us, the wavelength of light that it emits stretches and is "redshifted" toward the infrared part of the electromagnetic spectrum. This means that a very distant galaxy emitting primarily visible or ultraviolet light will appear infrared by the time its light reaches Earth.

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