Advertisements
Advertisements
प्रश्न
The change in focal length of an eye lens is caused by the action of the ______.
पर्याय
pupil
retina
ciliary muscles
iris
Advertisements
उत्तर
The change in focal length of an eye lens is caused by the action of the ciliary muscles.
Explanation:
The ciliary muscles change the focal length of the eye lens by changing its shape.
APPEARS IN
संबंधित प्रश्न
What happens to the image distance in the eye when we increase the distance of an object from the eye?
Identify and explain concepts given in this diagram.
The 'eye muscles' are controlled by which cranial nerves?
Near and far points of a young person normal eye respectively are:
The focal length of the eye lens increases when eye muscles ____________.
A student sitting on the last bench can read the letters written on the blackboard but is not able to read/the letters written in his textbook. Which of the following statements is correct?
When light rays enter the eye, most of the refraction occurs at the
How are we able to see nearby and also the distant objects clearly?
A piece of red glass is heated till its glows in dark. The colour of flowing glass would be:-
In the blind spot of the human eye ______.
In simple microscope ______ lens is used.
The vitamin required for the synthesis of rhodopsin is ______.
Name the following:
Two types of adaptations.
Define the following term:
Adaptation
Differentiate between members of the following pair with reference to what is asked in the bracket.
Dark and light adaptation (pigments which will be regenerated).
The figures (A) and (B) given below are showing some kind of adjustment. Study the figures and answer the questions that follow.
| A |  |
 |
B |
- Identify the kinds of adjustments done in the figures (A) and (B).
- Distinguish between the adjustments of figures (A) and (B) on the basis of:
- The size of pupil.
- The pigment which gets regenerated.
- Cells of the retina.
