Answer 1:
Yes, different colored lights affect the
images we see. Normally when white light hits a
pigmented object -- for example let's say red
fabric -- the fabric absorbs all colors except
red: it reflects red light, which is why we
perceive it as red. The same is true of other
colors (green plants reflect green light, blue
paper reflects blue light, etc.). Let's go back
to this red fabric we were thinking about. If we
now pass the white light through a blue filter,
which only transmits blue light, the fabric will
now appear very dark. This is because what we
were calling the red fabric absorbs everything
except for red light. If the only source of
light is blue, and it is absorbing all of it,
nothing will be reflected and the shirt will
look very dark or black. On the other hand, if
we passed white light through a red filter, the
fabric would still look red since it would be
receiving only red light but reflecting all (or
most) of it! I hope this helps.
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