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Use this for questions relating to the proper use of physics terminology or nomenclature.

1 vote

What is the difference between a hollow (sphere/cylinder) and a shell (cylinder/sphere)?

Suppose an electrical wire, if you take out everything that is present inside the covering, you get a shell, but if you take out the central wire , you get a hollow cylinder. According to me, shell is …
Quark's user avatar
  • 619
10 votes
2 answers
38k views

Difference between convexo-concave and concavo-convex lenses?

What is the difference between concavo-convex and convexo-concave lenses? We dont say convexo-plane for plano-convex. Does that mean concavo-convex and convexo-concave are essentially the same?
Quark's user avatar
  • 619