MindMap Gallery Physics Lens
Physics: A mind map of lenses, which introduces lenses, their effects on light, focus, three special rays of convex lenses, three special rays of concave lenses, and determining which type of lens it is based on light, take a look.
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1. Lens
lens
concave lens
Thin in the middle, thick at the edges
convex lens
thick in the middle, thin at the edges
The effect of lenses on light
Convex lenses have a converging effect on light (also called converging lenses)
Concave lenses have a divergent effect on light (also called divergent lenses)
focus
The light rays parallel to the main optical axis converge after passing through the convex lens (diverge after passing through the concave lens, and their reverse extension lines intersect) and the point on the main optical axis, represented by F
A convex lens has two real foci
A concave lens has two virtual foci
Three special rays of convex lens
No change of heart
Parallel focus
over focus parallel
Three special rays of concave lens
No change of heart
Parallel focus
over focus parallel
Determine what kind of lens it is by light
If the refracted ray is on the inside of the extension line of the incident ray, it is a convex lens.
If the refracted ray is outside the extension line of the incident ray, it is a concave lens.