Exposure+to+the+rays+of+the+sun
131Depth of field — The area within the depth of field appears sharp, while the areas in front of and beyond the depth of field appear blurry …
132PHYSICS — The material presented in this entry emphasizes those contributions which were important in arriving at verified present day scientific results, rather than those that may have appeared important at the time. Unavoidably it will overlap in parts… …
