A mirror beam PQ of white light is passing through a glass
prism ABC as shown in diagram
(a) Write the name and cause of the phenomenon observed?
(b) Where else in the nature is this phenomenon observed?
(c) Based on this observation, state the conclusion which can
be drawn about the constituents of white light.
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(i) The phenomenon is called dispersion of light. It is because of the reason that different wavelengths of light travel with different speed in the glass prism.
(ii) In a rainbow.
(iii) White light consists of seven different wavelengths viz. violet, indigo, blue, green, yellow, orange and red
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