Class VII

If an object is extremely denser, light
  1. passes through it faster
  2. passes through it slower
  3. leaves it with great angle
  4. never leaves it
Refractive index of silicon is
  1. 2.34
  2. 3.22
  3. 4.01
  4. 4.02
Leaf looks green because it absorbs
  1. all the colors except green
  2. green color and reflects the other colors
  3. red and yellow colors
  4. blue and yellow colors
Sensitive screen at back of eye is called
  1. Blind spot
  2. Conjunctiva
  3. Cornea
  4. Retina
For refraction of light, angle of incidence must be
  1. equal to zero
  2. less than zero
  3. greater than zero
  4. less than or greater than zero
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