Class X

Which of the following colors is least scattered by fog, dust of smoke?
  1. Violet
  2. Blue
  3. Red
  4. Yellow
Which of the following colors is least scattered by fog, dust of smoke?
  1. Violet
  2. Blue
  3. Red
  4. Yellow
The least distance of distinct vision for a young adult with normal vision is
  1. 25 m
  2. 20 m
  3. 25 cm
  4. 20 cm
The change in the focal length of human eye is caused due to
  1. Ciliary muscles
  2. Pupil
  3. Cornea
  4. Iris
The part of the eyes refracts light entering the eye from external objects?
  1. Lens
  2. Cornea
  3. Iris
  4. Pupil
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