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प्रश्न
The eyes of a person are focused (i) on a nearby object, and (ii) on a distant object, turn by turn. In which case:
the focal length of eye-lens will be the maximum?
उत्तर
When the eyes of a person are focussed on a distant object, the focal length of the eye lens is the maximum.
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संबंधित प्रश्न
A person got his eyes tested by an optician. The prescription for the spectacle lenses to be made reads :
Left eye : +2.50 D
Right eye : +2.00 D
State whether these lenses are thicker in the middle or at the edges.
Give the scientific names of the following parts of the eye:
muscles which change the shape of the eye-lens.
Fill in the following blank with suitable word:
The part of eye sensitive to light is...................
Which part brings the image into sharp focus on the retina? How does it do this?
Choose the correct answer.
Rods are receptor of ______________
Choose the correct answer.
Which one is the photoreceptor _____________
The following figure show the change in the shape of the lens while seeing distant and nearby objects. Complete the figures by correctly labelling the diagram.
______ is a transparent layer.
Match the following
| 1. | Conjunctiva | a. | Coloured part of eye |
| 2. | Cornea | b. | Photosensitive layer |
| 3. | Iris | c. | Refraction |
| 4. | Retina | d. | Protection |
Where is the following located?
Yellow spot
