A pencil is held perpendicular to the optical axis of a concave spherical mirror. The pencil is 87 cm from the centre of the mirror and its image is found 18 cm from the mirror. (a) Calculate the focal length of the mirror.

A pencil is held perpendicular to the optical axis of a concave spherical mirror. The pencil is 87 cm from the centre of the mirror and its image is found 18 cm from the mirror. (a) Calculate the focal length of the mirror.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter37: Reflection And Images Formed By Reflection

Section: Chapter Questions

Problem 37PQ

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Concept explainers

Applications Of Reflection Of Light

When a light ray (termed as the incident ray) hits a surface and bounces back (forms a reflected ray), the process of reflection of light has taken place.

Sign Convention for Mirrors

A mirror is made of glass that is coated with a metal amalgam on one side due to which the light ray incident on the surface undergoes reflection and not refraction.

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