Which of the following results when a crest and trough meet?
a. nothing
b. no interference
c. constructive interference
d. destructive interference

What does the term discrediting mean?

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.