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1) If red, green and blue are mixed together, the formed color of light will be a. blue b. violet c. indigo d. white
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2) Like sound, light travels as a a. wave b. heat c. radiation d. volume
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3) The scientist who presented the theory of dispersion of light was a. French b. English c. Chinese d. Spanish
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4) The dispersion of white light into seven different colors is known as a. dispersion b. spectrum c. prism d. multi light bands
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5) The index that identifies each object is known as a. rare active index b. refractive index c. reflective index d. bending index
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6) If an object is extremely dense, light a. passes through it b. never passes through it c. leaves it at once d. never leaves it
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7) An example of a device in which convex lens is used, is a. mirror b. telescope c. spectacles d. contact lenses
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8) The disk spun on rainbow to join its seven colors in order to make the effect of white light is known as a. Rainbow disk b. Newton disk c. Newton's color disk d. Rainbow color disk
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9) Light travels fastest through a. vacuum b. air c. solids d. liquids
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10) Cones are also sensitive to a. secondary colors b. tertiary colors c. mixed colors d. primary colors
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11) Refractive index' of ice is a. 0.5 b. 1.5 c. 1.33 d. 1.31
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12) The light that has passed through a filter, is always a. dim b. bright c. sharp d. blur
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13) A red car looks red because it a. reflects all colors except red b. absorbs all colors except green and blue c. absorbs all colors except indigo d. reflects red color and absorbs others
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14) Refractive index' of silicon is a. 2.34 b. 3.22 c. 4.01 d. 4.02
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15) Who applied the word 'spectrum' to describe the rainbow of colors that combine to form white light? a. Isaac Newton b. Joseph Von Fraunhofer c. Michael Faraday d. Georg von Reichenbach
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16) In concave lenses, a distant object appears a. upright b. virtual c. magnified d. inverted
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17) A red "filter" a. allows green and blue color to pass b. allows red color to pass c. allows all colors to pass except red d. allows yellow color to pass
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18) As the light moves from one medium to another, its a. amplitude changes b. speed changes c. frequency and wavelength change d. wavelength changes only
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19) An example of 'refraction' of light is a. water b. wall c. brick d. metal
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20) To form other colors like brown, peach, purple etc. the colors that are required, are a. red, yellow and green b. red, blue and orange c. green, blue and yellow d. red, green and blue
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