La luz incide con un ángulo determinado cuando pasa del aire a un cristal cuyo índice de refracción es de 1.5. Determinar la velocidad de la luz en el cristal.

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

i don’t know what the answer is i wish i

close lines strong magnet less close weaker

dang that balls went far