Does sound travel outside earth's atmosphere in space explain

Why there is no inductive reactance in dc circuits

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.

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e