Class X

The light sensitive cell present on retina and is sensitive to the intensity of light is:
  1. Cones
  2. Rods
  3. Both rods and cones
  4. None of these
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 light sensitive cell present on retina and is sensitive to the intensity of light is:
  1. cones
  2. rods
  3. both a and b
  4. None of these
The image formed by retina of human eye is
  1. Virtual and erect
  2. Real and inverted
  3. . Virtual and inverted
  4. Real and erect
The phenomena of light responsible for the working of the human eye is
  1. Reflection
  2. Refraction
  3. Power of accommodation
  4. Persistence of vision
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