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Read the passage in the human eye and answer the questions.
Eye is a natural optical device by which humans could see objects around him. It forms an inverted, real image on a light sensitive surface. It works on the phenomenon of refraction of light through a natural convex lens. However, Meena was unable to see clearly the words written on the black board placed at a distance of approximately 3 m from her. Her mother discussed the same with the doctor. Doctor explained to her about this defect of vision and its correction.
The closest distance up to which a person can see without any strain in the eyes
- a)35 cm
- b)15 cm
- c)5 cm
- d)25 cm
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Read the passage in the human eye and answer the questions.Eye is a n...
A normal eye is not able to see distinctly the objects placed closer than 25 cm, without putting any strain on the eye. This is because the ciliary muscles of eyes are unable to contract beyond a certain limit. If the objects are placed at a distance less than 25 cm from the eye, then the objects appear blurred because light rays coming from the object meet beyond the retina.
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Read the passage in the human eye and answer the questions.Eye is a n...
normal eye is not able to see distinctly the objects placed closer than 25 cm, without putting any strain on the eye. This is because the ciliary muscles of eyes are unable to contract beyond a certain limit. If the objects are placed at a distance less than 25 cm from the eye, then the objects appear blurred because light rays coming from the object meet beyond the retina.
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Read the passage in the human eye and answer the questions.Eye is a n...
The Defect of Vision and its Correction:
To understand the closest distance up to which a person can see without any strain in the eyes, let's first discuss the defect of vision and its correction.
Defect of Vision:
In the given passage, it is mentioned that Meena was unable to see clearly the words written on the blackboard placed at a distance of approximately 3 m from her. This indicates a defect of vision known as myopia or nearsightedness. In myopia, the light rays from distant objects converge in front of the retina instead of directly on it, resulting in a blurry image.
Correction of Myopia:
To correct myopia and enable clear vision, a person with this defect needs a concave lens. A concave lens diverges the incoming light rays, allowing them to converge on the retina and form a clear image.
The Closest Distance for Clear Vision:
The closest distance up to which a person can see without any strain in the eyes depends on the power of the concave lens used for correction. The power of a lens is measured in diopters (D), and it is the reciprocal of the focal length in meters.
In the case of Meena, her closest distance for clear vision is given as option 'D', which is 25 cm. This means that with the concave lens she is using to correct her myopia, she can see objects clearly up to a distance of 25 cm without any strain in her eyes.
Explanation:
When a person with myopia tries to focus on objects beyond the closest distance for clear vision, the light rays from those objects converge in front of the retina, causing blurriness. However, when the object is brought closer to the eyes and reaches the closest distance, the light rays from that object converge on the retina, resulting in a clear image.
By using a concave lens of appropriate power, the light rays are diverged before entering the eye, allowing them to converge on the retina and form a clear image. The power of the concave lens is adjusted in such a way that the closest distance for clear vision is achieved.
Therefore, in Meena's case, the closest distance for clear vision is 25 cm, indicating that she can see objects clearly up to a distance of 25 cm without any strain in her eyes.
To understand the closest distance up to which a person can see without any strain in the eyes, let's first discuss the defect of vision and its correction.
Defect of Vision:
In the given passage, it is mentioned that Meena was unable to see clearly the words written on the blackboard placed at a distance of approximately 3 m from her. This indicates a defect of vision known as myopia or nearsightedness. In myopia, the light rays from distant objects converge in front of the retina instead of directly on it, resulting in a blurry image.
Correction of Myopia:
To correct myopia and enable clear vision, a person with this defect needs a concave lens. A concave lens diverges the incoming light rays, allowing them to converge on the retina and form a clear image.
The Closest Distance for Clear Vision:
The closest distance up to which a person can see without any strain in the eyes depends on the power of the concave lens used for correction. The power of a lens is measured in diopters (D), and it is the reciprocal of the focal length in meters.
In the case of Meena, her closest distance for clear vision is given as option 'D', which is 25 cm. This means that with the concave lens she is using to correct her myopia, she can see objects clearly up to a distance of 25 cm without any strain in her eyes.
Explanation:
When a person with myopia tries to focus on objects beyond the closest distance for clear vision, the light rays from those objects converge in front of the retina, causing blurriness. However, when the object is brought closer to the eyes and reaches the closest distance, the light rays from that object converge on the retina, resulting in a clear image.
By using a concave lens of appropriate power, the light rays are diverged before entering the eye, allowing them to converge on the retina and form a clear image. The power of the concave lens is adjusted in such a way that the closest distance for clear vision is achieved.
Therefore, in Meena's case, the closest distance for clear vision is 25 cm, indicating that she can see objects clearly up to a distance of 25 cm without any strain in her eyes.
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Read the passage in the human eye and answer the questions.Eye is a natural optical device by which humans could see objects around him. It forms an inverted, real image on a light sensitive surface. It works on the phenomenon of refraction of light through a natural convex lens. However, Meena was unable to see clearly the words written on the black board placed at a distance of approximately 3 m from her. Her mother discussed the same with the doctor. Doctor explained to her about this defect of vision and its correction.The closest distance up to which a person can see without any strain in the eyesa)35 cmb)15 cmc)5 cmd)25 cmCorrect answer is option 'D'. Can you explain this answer?
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Read the passage in the human eye and answer the questions.Eye is a natural optical device by which humans could see objects around him. It forms an inverted, real image on a light sensitive surface. It works on the phenomenon of refraction of light through a natural convex lens. However, Meena was unable to see clearly the words written on the black board placed at a distance of approximately 3 m from her. Her mother discussed the same with the doctor. Doctor explained to her about this defect of vision and its correction.The closest distance up to which a person can see without any strain in the eyesa)35 cmb)15 cmc)5 cmd)25 cmCorrect answer is option 'D'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Read the passage in the human eye and answer the questions.Eye is a natural optical device by which humans could see objects around him. It forms an inverted, real image on a light sensitive surface. It works on the phenomenon of refraction of light through a natural convex lens. However, Meena was unable to see clearly the words written on the black board placed at a distance of approximately 3 m from her. Her mother discussed the same with the doctor. Doctor explained to her about this defect of vision and its correction.The closest distance up to which a person can see without any strain in the eyesa)35 cmb)15 cmc)5 cmd)25 cmCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Read the passage in the human eye and answer the questions.Eye is a natural optical device by which humans could see objects around him. It forms an inverted, real image on a light sensitive surface. It works on the phenomenon of refraction of light through a natural convex lens. However, Meena was unable to see clearly the words written on the black board placed at a distance of approximately 3 m from her. Her mother discussed the same with the doctor. Doctor explained to her about this defect of vision and its correction.The closest distance up to which a person can see without any strain in the eyesa)35 cmb)15 cmc)5 cmd)25 cmCorrect answer is option 'D'. Can you explain this answer?.
Read the passage in the human eye and answer the questions.Eye is a natural optical device by which humans could see objects around him. It forms an inverted, real image on a light sensitive surface. It works on the phenomenon of refraction of light through a natural convex lens. However, Meena was unable to see clearly the words written on the black board placed at a distance of approximately 3 m from her. Her mother discussed the same with the doctor. Doctor explained to her about this defect of vision and its correction.The closest distance up to which a person can see without any strain in the eyesa)35 cmb)15 cmc)5 cmd)25 cmCorrect answer is option 'D'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Read the passage in the human eye and answer the questions.Eye is a natural optical device by which humans could see objects around him. It forms an inverted, real image on a light sensitive surface. It works on the phenomenon of refraction of light through a natural convex lens. However, Meena was unable to see clearly the words written on the black board placed at a distance of approximately 3 m from her. Her mother discussed the same with the doctor. Doctor explained to her about this defect of vision and its correction.The closest distance up to which a person can see without any strain in the eyesa)35 cmb)15 cmc)5 cmd)25 cmCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Read the passage in the human eye and answer the questions.Eye is a natural optical device by which humans could see objects around him. It forms an inverted, real image on a light sensitive surface. It works on the phenomenon of refraction of light through a natural convex lens. However, Meena was unable to see clearly the words written on the black board placed at a distance of approximately 3 m from her. Her mother discussed the same with the doctor. Doctor explained to her about this defect of vision and its correction.The closest distance up to which a person can see without any strain in the eyesa)35 cmb)15 cmc)5 cmd)25 cmCorrect answer is option 'D'. Can you explain this answer?.
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