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
Related Questions
- A student traces the path of a ray of light through a triangular glass prism for different values of angle of incidence
- Is the type of lens used converging or diverging
- Why do stars twinkle ? Explain
- If the image formed by a spherical mirror for all positions of the object placed in front of it is always erect and diminished
- What is meant by power of a lens ? Write its SI unit
- What is meant by power of a lens ? Define its S.I. unit.