An object 2.0mm high is placed 18cm from a convex mirror of radius of curvature

Question

An object 2.0mm high is placed 18cm from a convex mirror of radius of curvature 18cm .

Part B

Determine the image distance using the mirror equation 1/do+1/di=1/f.Follow the sign conventions.

Express your answer to one significant figure and include the appropriate units.

Part C

Determine the image size using the equation for magnification m=hi/ho=?di/do. Follow the sign conventions.

Express your answer to one significant figure and include the appropriate units.

Detailed answers will be considered over ones with no work shown at all.

Explanation / Answer

B)

Here , ho = 2 mm

di = ?

do = 18 cm

f = -18/2 = -9 cm

f = -9 cm

Using mirror formula

1/f = 1/di + 1/do

-1/9 = 1/di + 1/18

di = -6 cm

the image distance is -6 cm

C)

Now, hi = -di*ho/do

hi = 6*2/18

hi = 0.67 mm = 0.7 mm

the height of the image is 0.7mm

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