Answer:
True
Explanation:
Depth is the shading behind or in the picture
I may be wrong if so I am sorry.
Figure-ground Reversal should be the answer lmk if i’m wrong
Answer:
Glass is the most common material used to construct lens elements, due to its good optical properties and resistance to scratching. Other materials are also used, such as quartz glass, fluorite, plastics like acrylic (Plexiglass), and even germanium and meteoritic glass.