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प्रश्न
Explain why, when it is getting dark at night, it is impossible to make out the colour of cars on the road.
उत्तर
When it gets dark at night, the level of light is too low for the cone cells, which are responsible for colour perception, to function efficiently. This makes it difficult to see the colours of cars on the road.
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संबंधित प्रश्न
The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to ______.
How does the eye regulate the amount of light that falls on the retina?
Name the part of the eye:
which changes the focal length of eye-lens.
State whether the following statement is true or false:
The image formed on our retina is upside-down
Explain the functions of the following parts of the eye:
(i) cornea
(ii) iris
(iii) pupil
(iv) ciliary muscles
(v) eye-lens
What shape are your eye-lenses:
when you look at your hand?
fill in the following blank with suitable word:
A person is short-sighted if his eyeball is too............Spectacles with a .............lens are needed. A person is long-sighted if his eyeball is too............Spectacles with a ................lens are needed. These focus light rays exactly on to the..........
Write an Explanation.
Minimum distance of distinct vision
The thin, transparent extension of sclerotic layer found in front of the lens is ______.
Name the following:
Two pigments of the sensory cells.
