Math Problem Statement

A convex spherical mirror has a radius of curvature of magnitude 46.0 cm. Determine the position of the virtual image and the magnification for object distances of 41.0 cm. Indicate the location of the image with the sign of your answer.

Solution

To solve this problem, we will use the mirror equation and the magnification formula for spherical mirrors.

Mirror Equation:

1f=1do+1di\frac{1}{f} = \frac{1}{d_o} + \frac{1}{d_i} Where:

  • ff is the focal length of the mirror
  • dod_o is the object distance
  • did_i is the image distance (which we will solve for)

The focal length (ff) is related to the radius of curvature (RR) by the equation: f=R2f = \frac{R}{2} For this convex mirror, the radius of curvature R=46.0cmR = 46.0 \, \text{cm}, so: f=46.02=23.0cmf = \frac{46.0}{2} = 23.0 \, \text{cm} Since it's a convex mirror, the focal length is positive.

Step 1: Use the Mirror Equation to find did_i

Now we will use the mirror equation: 123.0=141.0+1di\frac{1}{23.0} = \frac{1}{41.0} + \frac{1}{d_i} Rearranging to solve for did_i: 1di=123.0141.0\frac{1}{d_i} = \frac{1}{23.0} - \frac{1}{41.0}

We can now calculate did_i.

Step 2: Calculate Magnification

The magnification (MM) is given by: M=didoM = -\frac{d_i}{d_o}

Now let's compute the values.


Let me perform the calculations: Given values R = 46.0 # Radius of curvature in cm do = 41.0 # Object distance in cm

Focal length (f) for a convex mirror

f = R / 2

Calculating the image distance (di) using the mirror equation

di = 1 / ((1 / f) - (1 / do))

Calculating magnification (M)

M = -di / do

di, MThe image distance did_i is approximately 52.39 cm (positive sign indicates it's a virtual image behind the mirror), and the magnification MM is approximately -1.28.

Interpretation:

  • The image is located at a distance of 52.39 cm behind the mirror, indicating it is a virtual image (as expected for a convex mirror).
  • The magnification of -1.28 means that the image is inverted and about 1.28 times larger than the object.

Summary:

  • Image position: +52.39 cm (virtual image)
  • Magnification: -1.28 (inverted and larger)

Would you like further explanation or have any additional questions?

Here are 5 related questions:

  1. How does the focal length relate to the radius of curvature for a spherical mirror?
  2. How does the sign convention for object and image distances affect the calculations for spherical mirrors?
  3. How can we calculate the magnification for a concave mirror?
  4. What happens to the image position and magnification as the object distance decreases in a convex mirror?
  5. How do convex mirrors differ from concave mirrors in terms of image formation?

Tip: Remember that for convex mirrors, the image is always virtual, upright, and smaller than the object, regardless of the object's position.

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Math Problem Analysis

Mathematical Concepts

Mirror Equation
Magnification
Spherical Mirrors
Convex Mirror Properties

Formulas

Mirror Equation: 1/f = 1/do + 1/di
Magnification: M = -di/do

Theorems

Spherical Mirror Equation
Magnification for Spherical Mirrors

Suitable Grade Level

Grades 10-12