Can you help and explain
-Electric field-
Im stuck

  concave means having an outline or surface that curves inward like the interior of a circle or sphere. so the mirror curves inward.

The independent variable in this experiment is the angle at which the light from the ray box strikes the mirror.hope this .

The chemical reactions lab we did is typically called a "copper plating lab,  because the acid solution cleaned the pennies and made the copper look shinier;   the acid solution cleaned the paperclips and made them look like pennies;   &   the copper from the pennies was removed, and then added to the paperclips.