Inevitable manufacturing imperfections in optical fiber leads to birefringence, which is one cause of pulse broadening in fiber-optic communications. Such imperfections can be geometrical (lack of circular symmetry), due to stress applied to the optical fiber and/or due to bending of the fiber.
<span>The water soaks in the cracks of rocks, freezes and expands breaking the rock apart.</span>
Answer:
5
Explanation:
just subtract 20-25 and 5 is left over which is how much the water when up with the rock.
