Question
What is optical density of a medium? Give brief information about it.
✓
Answer
- The ability of a medium to refract light is expressed in terms of its optical density.
- Optical density has a definite connotation.
- It is not the same as mass density.
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At one of the blind ends of a road in a colony, lot of accidents used to take place. One day, Shalini moved into a house near the blind end. On a certain day, she saw an accident taking place at the blind end.
She, at once rushed to the spot and helped the victims with the first-aid. She then telephoned for an ambulance. Later on she met the president of the welfare committee of the colony and requested him to install huge convex mirrors at both the ends of the blind end. After the installation of the mirrors the accident rate suddenly dropped.
(1) Why did Shalini advise the installation of huge convex mirrors at both ends of the blind end?
(2) What according to you are the values displayed by Shalini?
(3) What according to you are the values displayed by president of the welfare committee of the colony?
She, at once rushed to the spot and helped the victims with the first-aid. She then telephoned for an ambulance. Later on she met the president of the welfare committee of the colony and requested him to install huge convex mirrors at both the ends of the blind end. After the installation of the mirrors the accident rate suddenly dropped.
(1) Why did Shalini advise the installation of huge convex mirrors at both ends of the blind end?
(2) What according to you are the values displayed by Shalini?
(3) What according to you are the values displayed by president of the welfare committee of the colony?
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