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Indian Navy 10+2 B.Tech Cadet The Human Eye and the Colourful World — practice questions

Explore 6 free The Human Eye and the Colourful World questions in Indian Navy 10+2 B.Tech Cadet Physics. Open each question or exercise to read its content, reference answers and available explanation.

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The Human Eye and the Colourful World questions and exercises with answers

Showing questions 1–6 of 6.

The transparent front layer of the human eye is called the:Read the answer and worked solution →Power of accommodation of the eye is the ability of the eye lens to:Read the answer and worked solution →A near-sighted person can see only objects nearer than:Read the answer and worked solution →Why does a hypermetropic eye have its near point farther than 25 cm?Read the answer and worked solution →The phenomenon of bending of light caused by gas density variations in the atmosphere is called:Read the answer and worked solution →Why do planets NOT twinkle though stars do?Read the answer and worked solution →

Worked practice questions

The transparent front layer of the human eye is called the:

  1. Lens
  2. Retina
  3. Iris
  4. Cornea
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Correct answer: D. Cornea

1. The cornea is the curved transparent membrane at the front of the eye. 2. Most of the eye's refraction takes place at the cornea. 3. Retina is the light-sensitive back of the eye. 4. So the front transparent layer is the cornea. _Source: syllabus Science Ch 11 'Human Eye and the Colourful World'_

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Power of accommodation of the eye is the ability of the eye lens to:

  1. Change its colour
  2. Change its size
  3. Change its focal length
  4. Change its position
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Correct answer: C. Change its focal length

1. The ciliary muscles around the eye lens can squeeze or relax it. 2. Squeezing curves the lens more, decreasing its focal length. 3. Relaxing flattens it, increasing focal length. 4. This adjustment of focal length is the power of accommodation. 5. So the answer is changing focal length. _Source: syllabus Science Ch 11 'Human Eye and the Colourful World'_

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A near-sighted person can see only objects nearer than:

  1. His near point
  2. His blind spot
  3. Infinity
  4. His far point
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Correct answer: D. His far point

1. The far point of a normal eye is at infinity. 2. In myopia, the far point shifts closer to the eye. 3. Objects beyond the far point form blurred images. 4. A near-sighted person therefore cannot see beyond his far point. 5. So clear vision is possible only nearer than the far point. _Source: syllabus Science Ch 11 'Human Eye and the Colourful World'_

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