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प्रश्न
The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light
पर्याय
is scattered the most by smoke or fog
is scattered the least by smoke or fog
is absorbed the most by smoke or fog
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उत्तर
moves fastest in air
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संबंधित प्रश्न
The least distance of distinct vision for a young adult with normal vision is about ______.
Why is a normal eye not able to see clearly the objects placed closer than 25 cm?
What happens to the image distance in the eye when we increase the distance of an object from the eye?
Write the name.
The sensation on the retina persists for a while is
Identify and explain concepts given in this diagram.
The ability of the eye lens to adjust its focal length to form a sharp image of the object at varying distances on the retina is called:
The focal length of the eye lens increases when eye muscles ____________.
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?
In the blind spot of the human eye ______.
In simple microscope ______ lens is used.
Adjusting the focal length of the eye lens to view objects at different distances is done by ______.
The vitamin required for the synthesis of rhodopsin is ______.
Name the following:
Two types of adaptations.
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.
