Advertisements
Advertisements
प्रश्न
The figure below compares a part of our eye with a part of a photographic camera.
Name the corresponding parts of the eye the camera shown here that are comparable in function.
उत्तर
Cornea is comparable to the lens cover of the camera. The iris and pupil act like the aperture of a camera.
APPEARS IN
संबंधित प्रश्न
Describe the anatomy of the human eye.
Explain the mechanism of vision.
What is the principal function of the eye-lens?
Fill in the following blank with suitable word:
The part of eye sensitive to light is...................
Explain the functions of the following parts of the eye:
(i) cornea
(ii) iris
(iii) pupil
(iv) ciliary muscles
(v) eye-lens
The term " accommodation" as applied to the eye, refers to its ability to:
(a) control the light intensity falling on the retina
(b) erect the inverted image formed on the retina
(c) vary the focal length of the lens
(d) vary the distance between the lens and retina
What shape are your eye-lenses:
when you look at your hand?
Nocturnal animals (animals which sleep during the day and come out at night) tend to have wide pupils and lot of rods in their retinas. Suggest reasons for this.
Out of animals of prey and predators, which have their eyes:
on the opposite sides of their head?
Explain clearly why, a person who has lost the sight of one eye is at a disadvantage compared with the normal person who has two good eyes.
Mention if the following statement is true (T) or false (F) Give reason.
Short-sightedness and hyperopia are one and the same thing
Mention the characteristics of the image that falls on the retina of the eye.
With reference to the functioning of the eye, answer the question that follow:
Name the cells of the retina and its respective pigments which get activated in the dark.
Define the following:
Yellow spot
What are the functions of tears?
Name the following:
The focal length of the lens is altered by the contraction of which type of muscles.
Give Technical Term:
Name the part of the retina on which an object is focused for the clearest vision.
Write the function of the human eye and label parts of the figure given below.
A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in Figure . In which of the following cases, after dispersion, the third colour from the top corresponds to the colour of the sky?
 |
 |
 |
 |
| (i) | (ii) | (iii) | (iv) |
With reference to human eye answer the question that follow:
Name the part of the eye associated with the layer providing nourishment to the eye.
