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A student has difficulty reading the blackboard while sitting
Science
Science

Class 10

NCERT

Publisher:
NCERT
Subject:
Science
1

Chapter 1: Chemical Reactions and Equations

34 questions

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2

Chapter 2: Acid,Bases and Salts

39 questions

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3

Chapter 3: Metals and Non-metals

38 questions

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4

Chapter 4: Carbon and its Compound

24 questions

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5

Chapter 5: Periodic Classification of Elements

30 questions

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6

Chapter 6: Life Processes

13 questions

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7

Chapter 7: Control and Coordination

12 questions

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8

Chapter 8: How do Organism Reproduce?

11 questions

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9

Chapter 9: Heredity and Evolution

12 questions

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10

Chapter 10: Light -Reflection and Refraction

34 questions

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11

Chapter 11: The Human Eye and Colourful World

18 questions

Q1
The change in focal length of an eye lens is caused by the action of the :
Q2
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?
Q3
A person needs a lens of power dioptres for correcting his distance vision. For correcting his near vision he needs a lens of power dioptre. What is the focal length of the lens required for correcting (i) distance vision, and (ii) near vision?
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12

Chapter 12: Electricity

49 questions

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13

Chapter 13: Magnetic Effects of Electric Current

39 questions

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14

Chapter 14: Sources of Energy

24 questions

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15

Chapter 15: Our Environment

9 questions

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16

Chapter 16: Sustainable Management of Natural Resources

7 questions

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Question
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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?

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Views: 6,260 students

Updated on: Oct 8, 2023

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Book:

Science (NCERT)

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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?
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A student has difficulty in reading the blackboard while sitting in the last row. It shows that he is unable to see distant objects clearly. He is suffering from myopia. This defect can be corrected by using a concave lens.
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Practice more questions from Science (NCERT)

Q1
The change in focal length of an eye lens is caused by the action of the :
Q2
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?
Q3
A person needs a lens of power dioptres for correcting his distance vision. For correcting his near vision he needs a lens of power dioptre. What is the focal length of the lens required for correcting (i) distance vision, and (ii) near vision?
View all

Practice questions from Science (NCERT)

Question 1
Easy
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The human eye can focus objects at different distances by adjusting the focal length of the eye.
This is due to:
  1. Presbyopia
  2. Accommodation
  3. Near-sightedness
  4. Far-sightedness
Topic

Topic:

The Human Eye and Colourful World

Book

Book:

Science (NCERT)

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Question 2
Hard
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Views: 6,398

The far point of a myopic person is in front of the eye. What is the nature and power of lens required to correct the problem?
Topic

Topic:

The Human Eye and Colourful World

Book

Book:

Science (NCERT)

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Question 3
Easy
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The least distance of distinct vision for a young adult with normal vision is about
  1. 25 m
  2. 2.5 cm
  3. 25 cm
  4. 2.5 m
Topic

Topic:

The Human Eye and Colourful World

Book

Book:

Science (NCERT)

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Question 4
Medium
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Why does the sky appears dark instead of blue to astronauts ?
Topic

Topic:

The Human Eye and Colourful World

Book

Book:

Science (NCERT)

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Practice more questions from The Human Eye and Colourful World

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Question 11:
The bluish colour of water in deep sea is due to
  1. the presence of algae and other plants found in water
  2. reflection of sky in water
  3. scattering of light
  4. absorption of light by the sea
Topic

Topic:

The Human Eye and Colourful World

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Book:

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Question 2
Easy
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In the following diagram, the correctly marked angles are
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  2. Only i and
  3. and
  4. and
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Topic:

The Human Eye and Colourful World

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Exam:

Class 10th Board 2017

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Question 3
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Question 1:
A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power
  1. +0.5 D
  2. –0.5 D
  3. +0.2 D
  4. –0.2 D
Topic

Topic:

The Human Eye and Colourful World

Book

Book:

Science Exemplar (NCERT Exemplar)

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Question 4
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Question 12:
When light rays enter the eye, most of the refraction occurs at the
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  2. outer surface of the cornea
  3. iris
  4. pupil
Topic

Topic:

The Human Eye and Colourful World

Book

Book:

Science Exemplar (NCERT Exemplar)

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Question Text
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?
Updated OnOct 8, 2023
TopicThe Human Eye and Colourful World
SubjectScience
ClassClass 10
Answer TypeText solution:1 Video solution: 6
Upvotes670
Avg. Video Duration4 min