A student holding a mirror in his hand, directed the reflecting surface of the mirror
Light (10)A student holding a mirror in his hand, directed the reflecting surface of the mirror towards the Sun. He then directed the reflected light on to a sheet of paper held close to the mirror.
- What should he do to burn the paper ?
- Which type of mirror does he have ?
- Will he be able to determine the approximate value of focal length of this mirror from this activity ? Give reason and draw ray diagram to justify your answer in this case.
Answer
- Move the mirror/paper to focus the rays at one point
- Concave mirror
- Yes, distance between mirror and focal point gives approximate focal length.
- Exam Year: 2019
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