Class X Sciences
[papers from previous years]
A narrow beam PQ of white light is passing through a glass prism
ABC as shown in the diagram.
Trace it on your answer sheet and show the path of the emergent
beam as observed on the screen DE.
(i) Write the name and cause of the phenomenon observed.
(ii) Where else in nature is this phenomenon observed ?
(iii) Based on this observation, state the conclusion which can be
drawn about the constituents of white light.