24 August 2011

The Sun

we cannot see the sun unless its light reaches us. So we see then both at the same instant. We do not "see" the sun ever, which means we can only see the light emitted from the sun. With the sun's light it takes about 8 minutes to reach us, so we see the sun as it was 8 minutes before the present. That is what we mean when we say "we see the sun"

at exhibition with wall paper