A 4.0 c m -tall object is 10 c m in front of a convex mirror that has a -25 c m
ID: 2274502 • Letter: A
Question
A 4.0cm -tall object is 10cm in front of a convex mirror that has a -25cm focal length.A) Calculate the image position.
B )Calculate the image height. A 4.0cm -tall object is 10cm in front of a convex mirror that has a -25cm focal length.
A 4.0cm -tall object is 10cm in front of a convex mirror that has a -25cm focal length.
A 4.0cm -tall object is 10cm in front of a convex mirror that has a -25cm focal length.
A) Calculate the image position.
B )Calculate the image height. A) Calculate the image position. B )Calculate the image height.
Explanation / Answer
h0=4cm
d0=10cm
f=-25 cm
1/f=1/di+1/d0
1/di=1/f-1/d0
1/di=1/-25 - 1/10
(A)di=-7.1 cm [inverting] (negative sign indicates a virtual image)
magnificatiob=m=di/do=0.7143(ignoring the negative sign)
(B)hieght of image=m*h0=2.857 cm