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A student has difficulty in reading the blackboard while sitting in the last row. What could be the defect the child is suffering from ? How can it be corrected ?

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Since the child can.t see the distant blackboard clearly, the child is suffering from myopia. It can be corrected by using a concave lens of a suitable focal length.
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A student has difficulty reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be corrected?

A person cannot see objects further than 10 metres from the eye clearly. Name the defect of vision he is suffering from. How can it be corrected ? Draw a diagram for (i) defect of vision and also (ii) for its correction.

Study the diagram and answer the questions the follow it : (i) Which defect of vision is represented in the case ? Give reason for your answer. (ii) What could be two causes of this defect ? (iii) With the help of a diagram show how this defect can be corrected by the use of a suitable lens.

ZEN PUBLICATION-THE HUMAN EYE AND THE COLOURFUL WORLD-ZEN ADDITIONAL QUESTIONS SECTION - HIGHER ORDER THINKING SKILLS (HOTS)
  1. A student has difficulty in reading the blackboard while sitting in th...

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  2. Rohan is not able to contract his iris properly due to defect in his e...

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  3. What happens to the focal length of the eye lens when ciliary muscles ...

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  4. A person is wearing spectacles which is (i) thicker at the centre (ii)...

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  5. Does disperson occur in a follow prism ? Given reason.

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  6. Does a prism disperse when immersed in water ? If so, how is its spect...

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  7. Which of the following persons can donate their eyes after death ? A p...

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  8. In the spectrum of white light, which colour is deviated maximum ? (...

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  9. In the prism shown in the below figure, identify the prism angle.

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  10. Which of the followig solids are not prisms? Why ?

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  11. Why do some clouds appear white while some appear grey ?

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  12. Planet mercury has no atmosphere. What is the colour of its sky ?

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  13. The sun appears red at sunrise and sunset. This is due to scattering o...

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  14. A prism ABC [with BC as base] is placed in different orientations. A n...

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  15. Rohan is not able to contract his iris properly due to defect in his e...

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  16. What happens to the focal length of the eye lens when ciliary muscles ...

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  17. A person is wearing spectacles which is (i) thicker at the centre (ii)...

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    |

  18. Does dispersion occur in a prism ? Given reason.

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    |

  19. Does a prism disperse when immersed in water ? If so, how is its spect...

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    |

  20. Which of the following persons can donate their eyes after death ? A p...

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  21. In the spectrum of white light, which colour is deviated maximum ? (...

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