1) Which lens is a convex ? a) b) 2) Which lens is a concave? a) b) 3) have an outward curve on at least one side. a) Convex lenses b) Concave lenses 4) These lenses refract light toward a focus, or 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 waves together. b) They spread light waves spread light waves 9) Why concave lenses called negative lenses?  a) They bring light waves together. b) They spread light waves spread light waves 10) Focuses light. 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) Each time the light enters a new material, it bends slightly because it changes ................... a) color b) energy c) speed 13) How are convex and concave lenses alike? a) Made of transparent materials bend light. b) Made of transparent materials reflect light. c) Made of translucent materials bend light. 14) 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. 15) What is true about concave lenses ? a) The thick edge and thin center of a lens allows the glass or plastic to magnify an image. b) The thin edge and thick center of a lens allow it to focus light. 16) What is true about convex lenses ? a) The thick edge and thin center of a lens allows the glass or plastic to magnify an image. b) The thin edge and thick center of a lens allow it to focus light.

Convex vs Concave

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