Concave, Convex, Converge, Diverge

[MedPR]

I'm having trouble keeping these straight. Anyone have any tips?

Concave mirror = converging mirror
Convex mirror = diverging mirror
Concave lens = diverging lens
Convex lens = converging lens

I don't remember how to draw the ray diagrams, but I do like how TBR approaches it and I know the TBR shortcuts. It's easy when there is a picture or if they use "converging/diverging" but if convex/concave are in the question I spend forever trying to figure out if it is converging or diverging and often get mixed up mid-question.

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[chiddler]

conCAVE mirror

draw it. there's a cave!

knowing one of them is knowing all, if you can relate them to each other somehow (like X and Y are opposites). i don't remember exactly how I use to do it, though.

 

[MedPR]

conCAVE mirror

draw it. there's a cave!

knowing one of them is knowing all, if you can relate them to each other somehow (like X and Y are opposites). i don't remember exactly how I use to do it, though.

I don't get the concave mirror thing though, lol. I understand that concave mirror looks like a ")" but how does "conCAVE mirror" help me remember that it is a converging mirror?

 

[chiddler]

I don't get the concave mirror thing though, lol. I understand that concave mirror looks like a ")" but how does "conCAVE mirror" help me remember that it is a converging mirror?

oh!

😀

 

[MedPR]

Lol. Ok I will never forget that one. Thanks!

 

[Yreva]

Convex and Converging both start with CONVE. So just remember that they don't go together.

When you say convex, think diverging! And then the rest will follow young grasshoppa!!!

 

[MedPR]

Convex and Converging both start with CONVE. So just remember that they don't go together.

When you say convex, think diverging! And then the rest will follow young grasshoppa!!!

Yea, that was my first thought, but then I kept forgetting if the "CONVE" rule was for mirrors or lenses. Convex lens = converging lens, but convex mirror = diverging mirror.