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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
विकल्प
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
Write the name.
The persons which are unable to distinguish between different colours
Write an Explanation.
Persistence of vision
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?
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:
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 ____________.
The least distance of distinct vision for a normal eye is ____________.
A student sitting on the last bench can read the letters written on the blackboard but is not able to read/the letters written in his textbook. Which of the following statements is correct?
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 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 ______.
Name the following:
Two types of adaptations.
Define the following term:
Adaptation
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.
