1) Which lens is a convex ? a) b) 2) Which lens is a concave? a) b) 3) These lenses diverge light rays. a) Convex lenses b) Concave lenses 4) These lenses refract light rays forming a focal point. a) Convex lenses b) Concave lenses 5) These lenses spread light waves apart.​ a) Convex lenses b) Concave lenses 6) Called positive lenses. a) Convex lenses b) Concave lenses 7) Called negative lenses. a) Convex lenses b) Concave lenses 8) Why convex lenses called positive lenses?  a) They bring light rays together. b) They spread light rays. 9) Why concave lenses called negative lenses?  a) They bring light waves together. b) They spread light rays. 10) Focuses light rays and form a focal point. a) Convex lenses b) Concave lenses 11) Check the diagram. This arrow points to ..... a) light wave b) lens c) an angle  d) focal point. 12) How are convex and concave lenses alike? a) Made of transparent materials that bend light. b) Made of transparent materials that reflect light. c) Made of reflective materials that bend light. 13) Why are lenses made of clear glass or plastic? a) These materials allow light to pass through. b) These materials are cheap. c) These materials are strong. 14) Which type of lens can produce real and virtual images a) Convex lenses b) Concave lenses 15) Which type of lens produces only virtual images a) Convex lenses b) Concave lenses 16) A ray that goes straight through the lens doesn't change direction. This is true for a) Convex lenses b) Concave lenses c) Both convex and concave lenses

Convex vs Concave Lenses

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