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Assertion: Glass panes fixed to windows or doors of old buildings are slightly thicker at the bottom than at the top . Reason: Glass is a pseudo solid or supercooled liquid
Gallium is used as a pyrometric liquid. Why?
The diagram below shows a glass block suspended in a liquid. A beam of light of single colour is incident from liquid on one side of the block. (a) Draw diagrams to show how does the light bend when it travels from liquid to glass and then to liquid if (i) the light slows down in glass, and (ii) the light speeds up in glass. (b) State two conditions under which the light ray passing from liquid to glass travels straight without bending. will the glass be visible then ?
Light of a single colour is passed through a liquid having a piece of glass suspended in it. On changing the temperature of liquid, at a particular temperature the glass piece is not seen. (i) When is the glass piece not seen ? (ii) why is the light of a single colour used ?
ICSE-COMMON LABORATORY APPARATUS AND EQUIPMENTS-True or False
