Q26 of 216 Page 461

In the experiment ‘To trace the path of ray of light passing through a glass prism’.

i) What is the correct set-up?


ii) Justify for your correct set-up.


i. The correct set-up for the experiment is as shown in the diagram. The points E, F mark the position of the allpins.


ii.


The justification is that the pins should be around 5- 10 cm. apart and the incident angles chosen should be common values so as to make the calculations easy.


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While doing the experiment to show light is necessary for photosynthesis; the student was given following suggestions by his fellow students. Which are the correct suggestions given by his fellow students?

i) Safranin should be used instead of iodine.


ii) The leaf should be boiled in alcohol with water bath to remove chlorophyll.


iii) Transparent paper strip should be used instead of black paper strip.


iv) The plant should be destarched before starting the experiment.

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