Ram wants to observe the change in size of the pupil. He flashes light on Rajat's eye with a torch. What will he observe and why? Why should Ram not use laser light for this purpose? [3 MARKS]

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Solution

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1. Ram will observe that the pupil size decreases on receiving the light from the torch.
2. This is because the pupil tries to decrease the amount of light entering into the eye when brightness is more.
3. Ram should not use Laser because it has high energy and hence can damage the retina.

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