Not leaving the lights on when you don't need to. Also trying to conserve water
I knew this at one point but I forgot it
Therefore, a 10x eyepiece used with a 40X objective lens, will produce a magnification of 400X. The naked eye can now view the specimen at a magnification 400 times greater and so microscopic details are revealed. More on objective lenses here. Magnification is the ability to view an object as larger.
A. Tetanus does not refer to the shape of a bacterium.