Hello
(This image is taken from Physics textbook grade 10. The book has been published in Pakistan)
My question is: why do see the lion inverted in water in this image? I think it is due to the process of continuous reflection. But I am not sure. I need your help.
Thanks.
Hello
My question has two parts:
1) Why is plano convex lens used in slide projector? Why can't we use simple convex lens in it?
2) Why are two plano convex lenses used in slide projector? Why can't we use only one?Thanks!
https://www.etymonline.com/word/prism
I have checked the etymology form this dictionary. The words "prism" comes from a Latin word "prisma" which means "something sawed".
I don't understand how this meaning ("something sawed") relates to a prism. Could you please expand on this meaning and...