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प्रश्न
Differentiate between members of the following pair with reference to what is asked in bracket.
Rod and cone cells (pigment contained)
उत्तर
Rod cells contain rhodopsin whereas the cone cells contain iodopsin.
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संबंधित प्रश्न
Answer briefly:
How do you perceive the colour of an object?
Explain why the image distance in the eye does not change when we change the distance of an object from the eye?
Describe the anatomy of the human eye.
Name two parts of the eye which refract light rays (or bend light rays).
Name the part of the eye:
which controls the amount of light entering the eye.
Name the part of the eye:
on which the image is formed.
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?
What happens to the size of pupil of our eye (i) in dim light (ii) in bright light?
The size of the pupil of the eye is adjusted by:
(a) cornea
(b) ciliary muscles
(c) optic nerve
(d) iris
A man driving a car can read a distant road sign clearly but finds difficulty in reading the odometer on the dashboard of the car. Which of the following statement is correct about this man?
(a) The near point of his eyes has receded away.
(b) The near point of his eyes has come closer to him.
(c) The far point of his eyes has receded away.
(d) The far point of his eyes has come closer to him.
The animal which does not have eyes that look sideways is:
(a) Horse
(b) Chicken
(c) Lion
(d) Fish
The animals of prey have:
(a) two eyes at the front
(b) two eyes at the back
(c) two eyes on the sides
(d) one eye at the front and one on the side
Give Technical Term:
The cells of the retina that are sensitive to colour.
A small hole of changing diameter at the centre of Iris is called _______.
The image of an object at an infinite distance is obtained in a real and erect form through a convex magnifying glass.
When light rays enter the eye, most of the refraction occurs at the ____________.
Name the part of the eye which gives colour to the eyes.
Which part of the eye gets affected if someone is suffering from cataract? How is it treated?
Which of the following is responsible for the adjustment of the size of pupil?
Write the main functional activity of the following structure.
Choroid
