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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?
The change in focal length of an eye lens is caused by the action of the ______.
Write the name.
The persons which are unable to distinguish between different colours
Identify and explain concepts given in this diagram.
The eyes of the nocturnal birds like owls are having a large cornea and a large pupil. How does it help them?
The 'eye muscles' are controlled by which cranial nerves?
Having two eyes facilitates in
A: Increasing the field of view
B: Bringing three-dimensional view
C: Developing the concept of distance/size
Then the correct option is/are
Near and far points of a young person normal eye respectively are:
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.
Give the reason for the following:
A person from bright sunlight outside enters a poorly lit room and feels blinded for a short while.
The vitamin required for the synthesis of rhodopsin is ______.
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.
