How long does it take light from the nearest star other than the sun to reach earth? a) less than 1 second b) about 1 hour c) about 1 month d) about 4 years

Your answer should be D. About 4 years. Hope this helps! =^-^=

(The light reflected from the surface of the Moon takes only a second to reach Earth. The Sun is more than 8 light-minutes away. And so, if the light from the nearest star (Alpha Centauri) takes more than 4 years to reach us, we're seeing that star 4 years in the past.) Quora.com

electron microscopy and scanning tunneling microscopes gives us a greater understanding of atoms by being able to see the atom itself, and lets us see some atomic reactions.

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