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5. It makes a wide angle and it will be clear to see the vehicles with a convex mirror.
6.As red us the symbol for danger We can use the red light for traffic signal.
7.
8.Vitamin A, also called retinol, plays a role in transforming nerve impulses into images in the retina. The retina is a light-sensitive area in the back of your eye.
People who have pancreatic insufficiency, such as individuals with cystic fibrosis, have difficulty absorbing fat and are at a greater risk of having vitamin A deficiency because vitamin A is fat-soluble. This puts them at greater risk for developing night blindness.
9a.Tactual aids are non-optical sensory aids which involve the sense of touch,e.g- Braille system for blind people.
9b.5 images => 360/60 = 6-1= 5
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