HELP! Electronic signals can travel very long distances in fibers, due to total internal reflection.

Which surface feature of the moon is characterized by mountainous areas? terrae craters maria regolith

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

What is the speed of an object at a given moment?