The answer here
Two experiments are used to demonstrate how light travels in straight lines. In the first example, the presenter arranges three pieces of card, with holes in, in an uneven line. The light stops and cannot travel through all three cards. When she arranges the holes in a straight line, the light can travel through.
The awnser isthird bright band and it is constructive
Answer:
140.85 is the correct answer
A constellation is a group of stars in the sky.
If the group seems to form a pattern, or resemble anything,
it really has nothing to do with the constellation. The human
brain has evolved to seek and find patterns in what we see,
a habit of mind that turns out to have great survival value.
There's nothing "wrong" with seeing a pattern there. It's
a very natural, very human thing to do. But understand ...
the stars are not forming anything or doing anything. The
scorpion, the might hunter, the dog, the fish, the dragon,
the queen on her throne, the patterns ... are all in your mind.
I think so not take my answer because I think the answer is b