Air. + A solid of density 8000 kgm-3, weight 0.8
kgf in
When it is completely submerged in a liquid of density
5000 kgm-3 the weight
appears to
decrease. What is the apperent
weight of
the solid in the liquid?​

in this image, you can see solar radiation going through ocean water.

no image, but probably absorption

double the distance = divide strength by 4

one "light year" is the distance that light travels, through vacuum, in one julian year.   that's 365.25 days, of 24 hours each.