Question

A 4.0 cm tall light bulb is placed a distance of 35.5 cm from a

convex mirror with a focal length of -12.2 cm. The image distance is determined to be -9.1 cm. What is the image size?
a 3.12 cm
b 5.78 cm
C 7.23 cm
d 1.02 cm

Answer 1

D

Step-by-step explanation:

Answer:

Image distance () = - 9.08 cm

Image height () = 1.02 cm

Given: (object distance) , (object height) , (focal length)

Required: image distance () and image size ()

Equations:

Eqn 01: (mirror equation)

Eqn 02: (magnification equation)

Solution:

Solving for the image distance:

Solving for the image height / size:

there are 3 significant figures (35.5 is 3, 4.00 is 3, -12.2 is 3), therefore,

Answer:

Image distance () = - 9.08 cm

Image height () = 1.02 cm