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Rajasthan Board Class 10 (RBSE) The Human Eye and the Colourful World — practice questions

Explore 31 free The Human Eye and the Colourful World questions in Rajasthan Board Class 10 (RBSE) 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 1–30 of 31.

The transparent front layer of the human eye is called the:Read the answer and worked solution →The image of an object is formed on the:Read the answer and worked solution →The least distance of distinct vision for a healthy adult human eye is about: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 →White light splits into its colours when passed through a prism. This phenomenon is called:Read the answer and worked solution →Which defect of vision is corrected by a concave lens?Read the answer and worked solution →Which defect of vision is corrected by a convex lens?Read the answer and worked solution →In the human eye, the size of the pupil is controlled by the:Read the answer and worked solution →Why does the sky appear blue during the day?Read the answer and worked solution →A near-sighted person can see only objects nearer than:Read the answer and worked solution →Power of a corrective lens is expressed in dioptres. One dioptre equals:Read the answer and worked solution →Presbyopia is caused by:Read the answer and worked solution →Which of the following causes night blindness?Read the answer and worked solution →A person can read a book at 30 cm but cannot read it at 25 cm. The defect is:Read the answer and worked solution →A myopic person uses a lens of focal length -1.5 m. The power of this lens is:Read the answer and worked solution →The splitting of white light by a prism into colours is due to: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 →A myopic eye can be corrected by: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 are danger signals such as stop lights and fire engines coloured red?Read the answer and worked solution →Two convex lenses of focal lengths 20 cm and 50 cm are placed in contact. The power of the combination is:Read the answer and worked solution →Which of the following causes the colour of the clear sky to appear blue at noon?Read the answer and worked solution →The Tyndall effect refers to the:Read the answer and worked solution →A boy can see distant objects clearly but cannot read his textbook held at 25 cm. He suffers from:Read the answer and worked solution →Why do planets NOT twinkle though stars do?Read the answer and worked solution →The bluish colour scattered toward the sides of a sunbeam is described by:Read the answer and worked solution →A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of powerRead the answer and worked solution →At noon the sun appears white asRead the answer and worked solution →Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?Read the answer and worked solution →The bluish colour of water in deep sea is due toRead 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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The image of an object is formed on the:

  1. Retina
  2. Pupil
  3. Cornea
  4. Iris
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Correct answer: A. Retina

1. Light entering the eye is focused by the cornea and lens. 2. The focused image lands on the retina at the back of the eye. 3. The retina contains photoreceptors (rods and cones). 4. So the image forms on the retina. _Source: syllabus Science Ch 11 'Human Eye and the Colourful World'_

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The least distance of distinct vision for a healthy adult human eye is about:

  1. 10 cm
  2. 25 cm
  3. 50 cm
  4. 100 cm
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Correct answer: B. 25 cm

1. The least distance of distinct vision is the closest distance at which a healthy eye can see clearly. 2. For an average healthy adult this is about 25 cm. 3. Children can usually focus closer than adults. 4. So the standard answer is 25 cm. _Source: syllabus Science Ch 11 'Human Eye and the Colourful World'_

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