SAT Subject Physics Practice Question 227: Answer and Explanation
73. An object is placed 100 cm from a plane mirror. How far is the image from the object?
A. 50 cm
B. 100 cm
C. 200 cm
D. 300 cm
E. 400 cm
Correct Answer: C
The distance from the mirror to the image is equal to the distance from the mirror to the object. Therefore, the distance from the object to the image is 100 cm + 100 cm = 200 cm.