Intersection
If parallel rays (for example sun rays witch are almost parallel) falls on concave mirror, they are gathered at a point, where maximum heat can be generated and it is very small point,witch is called real focus. As we can take it on screen, it is called real focus.
Its called midnight sun and you can read it on Stephenie Meyer's website
Yes.
The witch in the book The lion The witch and the wardrobe is called the white witch. She is also half a Jim and half a giantess.
The high witch
Witch
Female: witch Male: warlock
Mom No, seriously hag, crone, spinster.
right triangle
Mary Bateman was called "the Yorkshire witch", but she wasn't really a witch. She was a con-artist.
A ray.
The Witch King of Angmar's sword is called The Morgul-Blade.