Advertisements
Advertisements
प्रश्न
Why does it take some time to see objects in a dim room when you enter the room from bright sunshine outside?
उत्तर
When we enter a dimly lit room, it takes time for our pupils to expand and let in enough light for the retina to 'see' the objects around. During this time, we are not able to see the objects very clearly.
APPEARS IN
संबंधित प्रश्न
The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to ______.
Draw labelled diagrams of the following: Eye
What happens to the eye when you enter a darkened cinema hall from bright sunshine? Give reason for your answer.
Name two animals having eyes:
one the sides of the head.
Name the following:
White part of the eye.
Give the main function of the following:
Lachrymal glands
Draw a diagram of the human eye as seen in a vertical section and label the parts which suit the following descriptions relating to the:
(i) photosensitive layer of the eye.
(ii) structure which is responsible for holding the eye lens in its position.
(iii) structure which maintains the shape of the eyeball and the area of no vision.
(iv) anterior chamber seen in front of the eye lens.
(v) outermost transparent layer seen in front of the eyeball.
Shylesh is a school-going kid studying standard VIII. He is crazy about playing video games on mobile phones. After a couple of months, his eyes turned red and he felt severe pain in his eyes. His science teacher enquired about this and advised his parents to take him to an eye doctor.
- How does excessive usage of mobile phone affect our eyes?
- What are the values shown by the teacher?
In a myopic eye, the image of the object is formed
The transparent membrane that keeps the eye moist is ______.
