Physics: Principles with Applications
Physics: Principles with Applications
6th Edition
ISBN: 9780130606204
Author: Douglas C. Giancoli
Publisher: Prentice Hall
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Chapter 23, Problem 2Q

What is the focal length of a plane mirror? What is the magnification of a plane mirror?

Expert Solution & Answer
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To determine

The focal length of a plane mirror and the magnification of a plane mirror

Answer to Problem 2Q

Solution:

The focal length of a plane mirror is infinity. The magnification of a plane mirror is one.

Explanation of Solution

Given:

A plane mirror

Formula used:

The mirror equation is given by

1f=1do+1di

Where

f is the focal length

do is the distance of the object from the mirror

di is the distance of the image from the mirror

The magnification, m, of a mirror is given by

m=dido

Where, the negative sign indicates as the convention.

Calculation:

The image of a plane mirror will always be upright, same size as the object and will be located far behind the mirror as the object is in front of the mirror.

The image formed by the plane mirror is the virtual image formed behind the mirror. The distance from the image to the mirror is always identical to the distance from the object to the mirror.

A spherical mirror becomes equivalent to a plane mirror when the limit of is radius of curvature tends to infinity.

Hence, the mirror formula can be applied to the plane mirror also.

The plane mirror, the distance of the object is equal to the distance of the image and the image is formed behind the mirror. Hence,

do=di

Then, the focal length is given by

1f=1do1do=0

f=

Then, the magnification of the plane mirror is

m=d0do

m=1

Chapter 23 Solutions

Physics: Principles with Applications

Ch. 23 - Prob. 11QCh. 23 - You look into an aquarium and view a fish inside....Ch. 23 - Prob. 13QCh. 23 - Prob. 14QCh. 23 - A child looks into a pool to see how deep it is....Ch. 23 - Prob. 16QCh. 23 - Prob. 17QCh. 23 - Prob. 18QCh. 23 - Prob. 19QCh. 23 - Prob. 20QCh. 23 - Prob. 21QCh. 23 - Prob. 22QCh. 23 - Prob. 23QCh. 23 - Prob. 24QCh. 23 - Prob. 25QCh. 23 - Prob. 26QCh. 23 - Prob. 27QCh. 23 - Prob. 28QCh. 23 - Prob. 29QCh. 23 - Prob. 30QCh. 23 - Prob. 31QCh. 23 - Prob. 32QCh. 23 - Prob. 33QCh. 23 - Prob. 1PCh. 23 - Prob. 2PCh. 23 - Two plane mirrors meet at a 1350 angle, Fig....Ch. 23 - Prob. 4PCh. 23 - Prob. 5PCh. 23 - Prob. 6PCh. 23 - Suppose you are 94 cm from a plane mirror. What...Ch. 23 - A solar cooker, really a concave mirror pointed at...Ch. 23 - How far from a concave mirror (radius 21.0 cm)...Ch. 23 - A small candle is 38 cm from a concave mirror...Ch. 23 - An object 3.0 mm high is placed 16 cm from a...Ch. 23 - A dentist wants a small mirror that, when 2.00 cm...Ch. 23 - You are standing 3.4 m from a convex security...Ch. 23 - The image of a distant tree is virtual and very...Ch. 23 - Prob. 15PCh. 23 - Prob. 16PCh. 23 - Prob. 17PCh. 23 - Some rearview mirrors produce images of cars to...Ch. 23 - Prob. 19PCh. 23 - Prob. 20PCh. 23 - Prob. 21PCh. 23 - Prob. 22PCh. 23 - Prob. 23PCh. 23 - Prob. 24PCh. 23 - Prob. 25PCh. 23 - Prob. 26PCh. 23 - Prob. 27PCh. 23 - Prob. 28PCh. 23 - Prob. 29PCh. 23 - Prob. 30PCh. 23 - Prob. 31PCh. 23 - Rays of the Sunare seen to make a 36.0° angle to...Ch. 23 - Prob. 33PCh. 23 - A beam of light in air strikes a slab of glass (n...Ch. 23 - Prob. 35PCh. 23 - Prob. 36PCh. 23 - Prob. 37PCh. 23 - Prob. 38PCh. 23 - Prob. 39PCh. 23 - Prob. 40PCh. 23 - 39. (Ill) (a) What is the minimum index of...Ch. 23 - 40. (Ill) A beam of light enters the end of an...Ch. 23 - Prob. 43PCh. 23 - Prob. 44PCh. 23 - Prob. 45PCh. 23 - Prob. 46PCh. 23 - Prob. 47PCh. 23 - Prob. 48PCh. 23 - Prob. 49PCh. 23 - Prob. 50PCh. 23 - A stamp collector uses a converging lens with...Ch. 23 - Prob. 52PCh. 23 - Prob. 53PCh. 23 - Prob. 54PCh. 23 - Prob. 55PCh. 23 - Prob. 56PCh. 23 - Prob. 57PCh. 23 - Prob. 58PCh. 23 - Prob. 59PCh. 23 - Prob. 60PCh. 23 - A diverging lens with f= -36.5 cm is placed 14.0...Ch. 23 - Prob. 62PCh. 23 - Prob. 63PCh. 23 - Two lenses, one converging with focal length 20.0...Ch. 23 - Prob. 65PCh. 23 - A double concave lens has surface radii of 33.4 cm...Ch. 23 - Prob. 67PCh. 23 - Prob. 68PCh. 23 - Prob. 69PCh. 23 - Prob. 70PCh. 23 - Prob. 71PCh. 23 - Prob. 72GPCh. 23 - Prob. 73GPCh. 23 - Prob. 74GPCh. 23 - The critical angle of a certain piece of plastic...Ch. 23 - Prob. 76GPCh. 23 - Prob. 77GPCh. 23 - Prob. 78GPCh. 23 - Prob. 79GPCh. 23 - Prob. 80GPCh. 23 - 77 77. If the apex of a prism is ? = 75o (see...Ch. 23 - Prob. 82GPCh. 23 - Prob. 83GPCh. 23 - Prob. 84GPCh. 23 - Prob. 85GPCh. 23 - Prob. 86GPCh. 23 - Prob. 87GPCh. 23 - Figure 23-65is a photograph of an eyeball with the...Ch. 23 - Prob. 89GPCh. 23 - Prob. 90GPCh. 23 - 87 ‘(a) Show that if two thin lenses of focal...Ch. 23 - Prob. 92GPCh. 23 - Prob. 93GPCh. 23 - Prob. 94GP
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