Concept explainers
Part (a) To Determine:
The type of mirror to be used.
Answer to Problem 79GP
Solution:
convex mirror
Explanation of Solution
Since we know that image formed is virtual and upright and smaller than the real object. We know that image formed by convex mirror are virtual and erect and magnification of convex mirror is always positive. Here in this case also image is virtual and erect, and magnification is positive because image is upright.
Part (b) To Determine:
The location of image
Answer to Problem 79GP
Solution:
24.9 cm
Explanation of Solution
Given:
Given that distance of object from mirror (say)
Height of object (say)
Height of image (say), and image is virtual and upright
Formula used:
Calculation:
Part (c) To Determine:
We must find the focal length of the mirror.
Answer to Problem 79GP
Solution:
112 cm
Explanation of Solution
Given:
Given that distance of object from mirror (say)u= 32 cm
Height of object (say)h1 = 4∙5 cm
Height of image (say)h2 = 3∙5 cm, and image is virtual and upright
Formula used:
Mirror formula for focal length
Calculation:
since we have got the value of
now mirror formula for focal length
Part (d) To Determine:
We must find the radius of curvature of the mirror.
Answer to Problem 79GP
Solution:
224 cm
Explanation of Solution
we will find the radius of curvature of mirror by formula 2/R = 1/f
Given:
Given that distance of object from mirror (say)u= 32cm
Height of object (say)h1 = 4∙5 cm
Height of image (say)h2 = 3∙5 cm, and image is virtual and upright
Formula used:
Radius of curvature formula
Calculation:
Since we know radius of curvature R is related to focal length f by
and we have found the value of
So
Chapter 23 Solutions
Physics: Principles with Applications
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