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1. Gurmit wanted to perform activity using a laser torch. Her teacher advised her not to do so. Can you explain the basis of the teacher’s advise?
Gurmit has been advised by her teacher this because the intensity of the laser light is and it is . The exposure to laser light damage to the retina.
So, it is advisable at a laser beam directly.
2. How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 40 cm?
If a candle is positioned between two parallel plane mirrors separated by \(40\ cm\), then images will be formed due to the reflections between the mirrors.
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