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Questions and Answers
What is the minimum distance required between two pillars for a person to distinguish between them, located 11 km away?
What is the minimum distance required between two pillars for a person to distinguish between them, located 11 km away?
- 6.4 m
- 1.6 m
- 12.8 m
- 3.2 m (correct)
Which of the following is a characteristic of Hypermetropia?
Which of the following is a characteristic of Hypermetropia?
- Distant objects are not seen clearly but nearer objects are clearly visible (correct)
- Neither distant nor near objects are seen clearly
- Distant objects are seen clearly but nearer objects are not clearly visible
- Both distant and near objects are seen clearly
What is the reason for Hypermetropia?
What is the reason for Hypermetropia?
- Focal length or radii of curvature of lens increases or power of lens decreases (correct)
- Distance between eye lens and retina decreases
- Focal length or radii of curvature of lens decreases or power of lens increases
- Distance between eye lens and retina increases
How can Hypermetropia be corrected?
How can Hypermetropia be corrected?
What is the angle of resolution of the human eye?
What is the angle of resolution of the human eye?
What is the minimum distance at which a normal eye can see objects clearly?
What is the minimum distance at which a normal eye can see objects clearly?
What is the minimum time interval between two consecutive light pulses that can be distinguished by the eye?
What is the minimum time interval between two consecutive light pulses that can be distinguished by the eye?
What is the minimum angular displacement between two objects that can be resolved by the eye?
What is the minimum angular displacement between two objects that can be resolved by the eye?
What is the term for the ability to see objects using both eyes?
What is the term for the ability to see objects using both eyes?
What is the part of the eye where the optic nerve goes to the brain and is not sensitive to light?
What is the part of the eye where the optic nerve goes to the brain and is not sensitive to light?
What is the focal length of the lens used to correct myopia for a person who wants to see an object at distance D?
What is the focal length of the lens used to correct myopia for a person who wants to see an object at distance D?
What is the main cause of presbyopia?
What is the main cause of presbyopia?
What type of lens is used to correct astigmatism?
What type of lens is used to correct astigmatism?
What is the magnifying power of a microscope given by?
What is the magnifying power of a microscope given by?
What is the formula for magnification when the final image is formed at D and ∞ for a simple microscope?
What is the formula for magnification when the final image is formed at D and ∞ for a simple microscope?
What is the refractive index of the eye lens?
What is the refractive index of the eye lens?
What happens to the radius of curvature of the eye lens when ciliary muscles contract?
What happens to the radius of curvature of the eye lens when ciliary muscles contract?
What is the purpose of the yellow spot in the retina?
What is the purpose of the yellow spot in the retina?
What is the significance of the power of accommodation in the human eye?
What is the significance of the power of accommodation in the human eye?
What is the minimum distance at which a normal eye can see objects clearly?
What is the minimum distance at which a normal eye can see objects clearly?
What is the minimum angular displacement required for the human eye to distinguish between two objects?
What is the minimum angular displacement required for the human eye to distinguish between two objects?
What is the effect of increasing the focal length of a corrective lens for hypermetropia?
What is the effect of increasing the focal length of a corrective lens for hypermetropia?
What happens to the image formed in the eye in a person with hypermetropia?
What happens to the image formed in the eye in a person with hypermetropia?
What is the reason for the limitation of the resolving power of the human eye?
What is the reason for the limitation of the resolving power of the human eye?
What is the purpose of using a concave lens to correct hypermetropia?
What is the purpose of using a concave lens to correct hypermetropia?
What is the magnification of a simple microscope if the final image is formed at the minimum focal length?
What is the magnification of a simple microscope if the final image is formed at the minimum focal length?
What is the focal length of a lens used to correct myopia for a person who wants to see an object at distance D?
What is the focal length of a lens used to correct myopia for a person who wants to see an object at distance D?
What is the condition for a telescope to have maximum magnifying power?
What is the condition for a telescope to have maximum magnifying power?
What is the effect of increasing the aperture of a telescope on its resolving power?
What is the effect of increasing the aperture of a telescope on its resolving power?
Which type of lens is used to correct astigmatism?
Which type of lens is used to correct astigmatism?
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