PHY 126 Final Exam B
Problem 1 (30 points)
170.0 cm
x cm
plane
mirror
converging
lens
As shown in Fig., an arrow is placed at a position, x cm from a plane mirror,
and 170.0 cm from a converging lens of focal length 64.0 cm. The arrow is seen
through the lens from the right-hand side of the lens. In this problem we are
concerned with the final image of the arrow reflected on the mirror and then focused
through the converging lens. First assume that x = 40.0 cm unless otherwise stated.
(a) Draw a principal-ray diagram that locates the final image (5 points).
(b) Calculate the location of the final image (5 points).
(c) Is the final image real or virtual and is it erect (upright) or inverted
with respect to the original object (1+1 points)?
(d) If x is changed to 44.0 cm, where is the location of the final image (3 points)?
(e) If the mirror is moving from x=40.0 cm to x=44.0 cm at a speed of 2.00 cm/s,
what is the corresponding speed of its final image viewed through the lens
(5 points)?

This ** preview** has intentionally

**sections.**

*blurred***to view the full version.**

*Sign up*