Physics
Grade-10
Easy
Question
The ability of the eye lens to change its curvature is called its _____.
- Power of accommodation
- Power of adjustment
- Power of the lens
- Power of flexibility
Hint:
Ability of the eye to change the focal length of lens.
The correct answer is: Power of accommodation
The correct option is a)Power of accommodation.
Accommodation is the ability to sharply focus near and far objects on the retina by adjusting the focal length of the lens. The eye's ability to accommodate is limited. This means that the focal length of the eye's lens cannot be reduced beyond a certain minimum limit.
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A human eye can see clearly from ____ to ______.
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A man wears a pair of spectacles of power +3.5. Which of the following statements is correct about him?
I. He is farsighted.
II. He wears concave lenses
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A man wears a pair of spectacles of power +3.5. Which of the following statements is correct about him?
I. He is farsighted.
II. He wears concave lenses
III. The focal length of the lens of his spectacles is positive
IV. His near point is farther than 25 cm from his eyes without lenses
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Which of the following parts of the eye focuses most of the light?
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The size of the pupil increases when ____.
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The power of the lens used by Roshan is +2.5 D. What type of lens does he use?
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The power of the lens used by Priyanka is –2.25 D. Which of these eye defects she probably has?
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Salma wears a pair of eye lenses of focal length - 80 cm. What is the power of the lenses?
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The corrective lens for a hypermetropia eye is ____.
The corrective lens for a hypermetropia eye is ____.
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Read the following statements and choose the correct answer.
I: Assertion: In a myopic eye, the light rays are focused in front of the retina.
II: Reason: The light rays can be focused on the retina by using a convex lens.
Read the following statements and choose the correct answer.
I: Assertion: In a myopic eye, the light rays are focused in front of the retina.
II: Reason: The light rays can be focused on the retina by using a convex lens.
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Match the following:
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To a person with myopia, the nearby objects appear _____ and the distant objects appear_____.
To a person with myopia, the nearby objects appear _____ and the distant objects appear_____.
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What is the eye defect shown in the picture below?
The correct option is a)Myopia.
- Nearsightedness or myopia is an eye condition caused by a refractive error that causes distant objects to appear blurry. A nearsighted person can clearly see nearby objects.
- Myopia means that the focus of the eye is in front of the retina instead of on it. The retina is the surface at the back of the eye that collects light.
- It converts light into electrical impulses that the brain interprets as images. Blurry vision can occur when the eye focuses light in front of the retina.
What is the eye defect shown in the picture below?
PhysicsGrade-10
The correct option is a)Myopia.
- Nearsightedness or myopia is an eye condition caused by a refractive error that causes distant objects to appear blurry. A nearsighted person can clearly see nearby objects.
- Myopia means that the focus of the eye is in front of the retina instead of on it. The retina is the surface at the back of the eye that collects light.
- It converts light into electrical impulses that the brain interprets as images. Blurry vision can occur when the eye focuses light in front of the retina.
