Advertisements
Advertisements
प्रश्न
Complete the following sentence with appropriate Word
The photoreceptor cells of the retina sensitive to colour are:
विकल्प
Cones
Pupil
Rods
Organ of corti
उत्तर
Cones
APPEARS IN
संबंधित प्रश्न
Explain why the image distance in the eye does not change when we change the distance of an object from the eye?
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 spectacle lenses will converge light rays or diverge light rays.
Name the part of the eye:
on which the image is formed.
Fill in the following blank with suitable word:
To bring light from a near object to a focus on the retina of the eye, the convex eye-lens need to be made....................
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
State whether the following statement is true or false:
Rabbit has eyes which look sideways.
Among animals, the predators (like lions) have their eyes facing forward at the front of their heads, whereas the animals of prey (like rabbit) usually have eyes at the sides of their head. Why is this so?
What is a lacrimal gland?
With reference to the functioning of the eye, answer the question that follow:
What is the shape of the lens during near vision?
With reference to the functioning of the eye, answer the question that follow:
What is the shape of the lens during distant vision?
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.
Give the main function of the following:
Fovea centralis
Choose the correct answer.
Aperture controlling passage to light into the eye is ___________
Answer the following question.
Trace the sequence of events Whichoccur when a bright light is focused on your eyes.
Write scientific reason.
The movie cannot be enjoyed if seat of a viewer is too close to the screen in the cinema.
A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power
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 |
Assertion (A): Rods and Cones are photoreceptors in the sclera of eyeball.
Reason (R): Rods are sensitive to dim light.
Write the main functional activity of the following structure.
Choroid
Write the main functional activity of the following structure.
Ciliary body and suspensory ligament
