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प्रश्न
What shape are your eye-lenses:
when you look at a distant tree?
उत्तर
When we look at a distant tree, the eye lens is thin. When we look at a far-off object, the eye is in a relaxed state. The eye lens becomes thin or less convex because a small converging power of the eye lens is sufficient to focus the parallel light rays from the distant object (the tree) to form an image on the retina.
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संबंधित प्रश्न
Night birds have ______ cones than rods in their eyes.
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?
How much is our field of view:
with one eye open?
With both eyes open, a person's field of view is about:
(a) 90°
(b) 150°
(c) 180°
(d) 360°
Mention if the following statement is true (T) or false (F) Give reason.
yellow spot of the retina is the region of colour vision
Select the odd one in the following series:
Retina, Sclera, Ciliary body, Nephron.
State the Location of:
Lacrimal gland
Match the following:
| Column - I | Column - II |
| 1. Retina | a. Pathway of light |
| 2. Pupil | b. Far point comes closer |
| 3. Ciliary muscles | c. near point moves away |
| 4. Myopia | d. Screen of the eye |
| 5. Hypermetropia | f. Power of accommodation |
Where is the following located?
Yellow spot
Name the following:
Two pigments of the sensory cells.
