En found out about light reflection on her own. She was playing with a mirror cum comb that grand aunt Lan gave her. She tried to reflect the ceiling light on the mirror and it reflected on the wall! She said "Mama, see !" So, I said "light travel in a straight line and in all direction. It bounces off the mirror onto the wall." I am not good in science subject (in fact, all subjects! ) and that's all I can remember. I showed her the diagram from the internet.
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