A Level Physics Practice Exam

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Study for the A Level Physics Exam. Our quiz features flashcards and multiple choice questions, each with hints and explanations. Prepare thoroughly!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

In the context of laser usage, why should users avoid shining it at people?

It can cause immediate visibility issues
It may reflect unpredictably
It can result in serious eye or skin injury
It can create unnecessary distractions

The correct answer is: It can result in serious eye or skin injury

The main reason users should avoid shining a laser at people is that it can result in serious eye or skin injury. Lasers emit light that is highly concentrated and can cause damage to sensitive tissues. When directed towards the eyes, even a brief exposure to laser light can lead to permanent vision impairment or blindness, as the intense light can burn the retina. Skin exposure to lasers can also result in burns or other injuries, depending on the power of the laser and the duration of exposure. This understanding underscores the safety precautions necessary when using lasers, highlighting the potential harm they can cause in a way that is both immediate and severe.