Light of a single colour is passed through a liquid having a piece of glass suspended in it . On charging the temperature of a liquid at a particular temperature the glass piece is not seen .
1. When is the glass piece not seen ?
2. Why is the light of a single colour used ?
Answers
Answer:
(i) The glass piece is not seen when the refractive index of liquid becomes equal to the refractive index of glass.
(ii) Light of a single colour is used because the refractive index of a medium (glass or liquid) is different for the light of different colours.
Explanation:
Answer:
In the case of water, the refractive index decreases with increasing temperature at constant specific volume, while in carbon tetrachloride the refractive index increases with increasing temperature, the changes in index in both cases being small—of the order of a few parts in the fourth decimal for a temperature change of 10 °C. It appears that, in the case of benzene, there is no significant dependence of refractive index upon temperature at constant volume
Explanation:
1. on changing temperature in such a way that refractive index of both glass and liquid come to same value then glass cannot be seen
2 . Different light beam can cause different refractive index of a glass and liquid as they have different wavelength or frequency So, only single colour light beam used for conducting experiment.