How does a normal EEG appear ?

When does the angiosperm appeared on Earth ?

Under symmetric refraction of light through a prism, how does the refracted ray appear with respect to the base of the prism?

How does the central fringe appear,when white light is used in a biprism experiment?Explain your answer.

A person sitting in a moving train throws a ball vertically upwards. How does the ball appear to move to an observer outside the train?

A person sitting in a moving train throws a ball vertically upwards. How does the ball appear to move to an observer inside the train