The size of an object as perceived by an eye depends primarily on
1. actual size of the object
2. distance of the object from the eye
3. aperture of the pupil
4. size of the image formed on the retina
The muscles of a normal eye are least strained when the eye is focused on an object
1. far away from the eye
2. very close to the eye
3. at about 25 cm from the eye
4. at about 1 m from the eye
A normal eye is not able to see objects closer than \(25~\text{cm}\) because:
1. | the focal length of the eye is \(25~\text{cm}.\) |
2. | the distance of the retina from the eye lens is \(25~\text{cm}.\) |
3. | the eye is not able to decrease the distance between the eye lens and the retina beyond a limit. |
4. | the eye is not able to decrease the focal length beyond a limit. |
When objects at different distances are seen by the eye, which of the following remain constant?
1. The focal length of the eye-lens
2. The object-distance from the eye-lens
3. The radii of curvature of the eye-lens
4. The image-distance from the eye-lens
A person A can clearly see objects between 25 cm and 200 cm. Which of the following may represent the range of clear vision for a person B having muscles stronger than A, but all other parameters of eye identical to that of A?
1. 25 cm to 200 cm
2. 18 cm to 200 cm
3. 25 cm to 300 cm
4. 18 cm to 300 cm
The focal length of a normal eye-lens is about
1. 1 mm
2. 2 cm
3. 25 cm
4. 1 m
The distance of the eye-lens from the retina is x. For a normal eye, the maximum focal length of the eye-lens
1. = x
2. < x
3. > x
4. = 2x
A man wearing glasses of focal length +1m cannot clearly see beyond 1 m
1. if he is farsighted
2. if he is nearsighted
3. if his vision is normal
4. in each of these cases
When we see an object, the image formed on the retina is
(a) real
(b) virtual
(c) erect
(d) inverted
Choose the correct option:
1. (a) and (b)
2. (b) and (c)
3. (c) and (d)
4. (a) and (d)
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The maximum focal length of the eye-lens of a person is greater than its distance from the retina. The eye is
1. always strained in looking at an object
2. strained for objects at larger distances only
3. strained for objects at short distances only
4. unstrained for all distances
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306664
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306664