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The focal length of the eye lens increases when eye muscles
- a)are relaxed and lens becomes thinner
- b)contract and lens becomes thicker
- c)are relaxed and lens becomes thicker
- d)contract and lens becomes thinner
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
The focal length of the eye lens increases when eye musclesa)are relax...
Cilliary muscles modify the curvature of eye lens. When eye muscles are relaxed, eye lens becomes thinner thereby are relaxed, eye lens becomes thinner thereby increase in the focal length of eye lens.
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The focal length of the eye lens increases when eye musclesa)are relax...
Answer is A, bcs the focal length of the eye lens increases when eye muscles are relaxed and lens become thinner
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The focal length of the eye lens increases when eye musclesa)are relax...
Focal Length of the Eye Lens
The focal length of the eye lens refers to the distance between the lens and the point where incoming light rays converge to form a sharp image on the retina. It is an important characteristic of the eye lens as it determines the ability of the eye to focus on objects at different distances.
Effect of Eye Muscles on the Eye Lens
The eye lens is a flexible, transparent structure located behind the iris (colored part of the eye). It is surrounded by a ring of muscles called the ciliary muscles. The ciliary muscles play a crucial role in changing the shape of the lens to adjust its focal length.
Relaxed Eye Muscles and Thinner Lens
When the eye muscles are relaxed, the ciliary muscles also relax. This causes the suspensory ligaments attached to the lens to become taut. As a result, the tension on the lens increases, making it thinner in the center and flatter in shape. This change in shape increases the focal length of the lens.
Explanation of Option A
Option A states that the focal length of the eye lens increases when the eye muscles are relaxed and the lens becomes thinner. This is the correct answer because it accurately describes the relationship between the relaxation of eye muscles and the change in lens shape.
When the eye muscles are relaxed, the ciliary muscles relax as well. This relaxation reduces the tension on the suspensory ligaments, allowing the lens to become thinner in the center. The thinner lens causes the incoming light rays to converge at a greater distance from the lens, resulting in an increased focal length.
Other Options
Options B, C, and D state that the focal length of the eye lens changes when the eye muscles contract and the lens becomes thicker. These options are incorrect because they do not accurately describe the relationship between the contraction of eye muscles and the change in lens shape.
When the eye muscles contract, the ciliary muscles also contract. This contraction reduces the tension on the suspensory ligaments, allowing the lens to become thicker in the center. The thicker lens causes the incoming light rays to converge at a shorter distance from the lens, resulting in a decreased focal length.
Therefore, only option A correctly explains the relationship between the relaxation of eye muscles and the increase in focal length of the eye lens.
The focal length of the eye lens refers to the distance between the lens and the point where incoming light rays converge to form a sharp image on the retina. It is an important characteristic of the eye lens as it determines the ability of the eye to focus on objects at different distances.
Effect of Eye Muscles on the Eye Lens
The eye lens is a flexible, transparent structure located behind the iris (colored part of the eye). It is surrounded by a ring of muscles called the ciliary muscles. The ciliary muscles play a crucial role in changing the shape of the lens to adjust its focal length.
Relaxed Eye Muscles and Thinner Lens
When the eye muscles are relaxed, the ciliary muscles also relax. This causes the suspensory ligaments attached to the lens to become taut. As a result, the tension on the lens increases, making it thinner in the center and flatter in shape. This change in shape increases the focal length of the lens.
Explanation of Option A
Option A states that the focal length of the eye lens increases when the eye muscles are relaxed and the lens becomes thinner. This is the correct answer because it accurately describes the relationship between the relaxation of eye muscles and the change in lens shape.
When the eye muscles are relaxed, the ciliary muscles relax as well. This relaxation reduces the tension on the suspensory ligaments, allowing the lens to become thinner in the center. The thinner lens causes the incoming light rays to converge at a greater distance from the lens, resulting in an increased focal length.
Other Options
Options B, C, and D state that the focal length of the eye lens changes when the eye muscles contract and the lens becomes thicker. These options are incorrect because they do not accurately describe the relationship between the contraction of eye muscles and the change in lens shape.
When the eye muscles contract, the ciliary muscles also contract. This contraction reduces the tension on the suspensory ligaments, allowing the lens to become thicker in the center. The thicker lens causes the incoming light rays to converge at a shorter distance from the lens, resulting in a decreased focal length.
Therefore, only option A correctly explains the relationship between the relaxation of eye muscles and the increase in focal length of the eye lens.
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The focal length of the eye lens increases when eye musclesa)are relaxed and lens becomes thinnerb)contract and lens becomes thickerc)are relaxed and lens becomes thickerd)contract and lens becomes thinnerCorrect answer is option 'A'. Can you explain this answer?
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