Homework SourseA dental hygienist uses a small concave mirror to look at th
A dental hygienist uses a small concave mirror to look at the back of a patient\'s tooth. If the mirror is 2.33 cm from the tooth and the magnification is 2.50, what is the mirror\'s focal length? (Include the sign of the value in your answer.)
cm
cm
A dental hygienist uses a small concave mirror to look at the back of a patient\'s tooth. If the mirror is 2.33 cm from the tooth and the magnification is 2.50, what is the mirror\'s focal length? (Include the sign of the value in your answer.)
cm
cm
Solution
Answer:
Magnification = - v/u = 2.50
u = 2.33 cm
this implies that v = - 2.50 x 2.33 = - 5.825
1/F = 1/v + 1/u
1/F = 1/(-5.825) + 1/(2.33)
F = 3.88 cm
