When a ray of light travels from air to glass slab and strikes the surface of sepantion at 90%.
TA) bends towards normal.
1) passes undeviated.
(B) bends away from normal.
(D) passes in zigzag way.
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The cell (from Latin cella, meaning "small room") is the basic structural, functional, and biological unit of all known organisms. A cell is the smallest unit of life. Cells are often called the "building blocks of life". The study of cells is called cell biology, cellular biology, or cytology.
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