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Question
Give the reason for the following:
A person from bright sunlight outside enters a poorly lit room and feels blinded for a short while.
Solution
- A person from the bright sunlight outside enters a poorly lit room and feels blinded for a short while due to dark adaptation.
- Dark adaptation includes regenerating rhodopsin, a pigment in rod cells that breaks down in strong light.
- The pupils dilate, allowing more light into the eyes.
- Adjustments can be time-consuming and may cause temporary blindness.
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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).
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- The pigment which gets regenerated.
- Cells of the retina.
