Some basics
A spherical surface curving invards
What is concave?
Concentrating the sun's rays at the focal point with a magnifying glass creates this
What is heat, smoke or fire?
A spherical surface bulging outward
What is convex?
Difficulty seeing objects in the distance
What is near-sighted?
a mirror with a positive f (focal length)
What is a concave mirror?
A lens that is convex on both sides
What is biconvex?
Difficulty seeing objects close to the eye
What is far-sighted?
If M (magnification) is positive, the image is...
What is upright?
The point where parallel light rays converge after refracting through a lens or reflecting off a mirror
What is the focal point?
The orientation of images on your eyes retina
What is inverted (flipped / upside down)?
a mirror with a negative f (focal length)
What is a convex mirror?
The distance from the center of a lens to the focal point
What is focal length?
In the pinhole "camera" project, if the pinhole was too large the image would become
What is fuzzy or out of focus?
The sign of the magnification (M) of an inverted image in a mirror
What is negative?