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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.
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संबंधित प्रश्न
Write the function of retina in human eye.
Differentiate between: Rods and cones
What is the least distance of distinct vision for a normal human eye?
There are two types of light-sensitive cells in the human eye:
Where are they found?
Refraction of light in the eye occurs at:
(a) the lens only
(b) the cornea only
(c) both the cornea and the lens
(d) the pupil
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
Which part brings the image into sharp focus on the retina? How does it do this?
Mention if the following statement is true (T) or false (F) Give reason.
yellow spot of the retina is the region of colour vision
Sometimes you remember a vivid picture of a dream you saw. What is the role of your eyes in this experience?
Assertion: Blind spot is a small area of the retina which is insensitive to light where the optic nerve leaves the eye.
Reason: There are no rods or cones present at the junction of the optic nerve and retina in the eye.
