Gurmit wanted to perform following Activity(Look into your friend’s eye. Observe the size of the pupil. Throw light on her eye with a torch. Observe the pupil now. Switch off the torch, and observe her pupil once again. Do you notice any change in the size of the pupil? In which case was the pupil larger? Why do you think it was so? In which case do you need to allow more light in the eye, when the light is dim or bright?) using a laser torch. Her teacher advised her not to do so. Can you explain the basis of the teacher’s advise?
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It is pupil reflex which is simple reflex.
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Answer:
Laser torch has laser light.
Laser light has very high intensity and hence it is harmful for the human eyes.
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