A 2.0-cm-tall object is 14 cm in front of a diverging lens that has a -20 cm focal length. Part A Calculate the image position. Express your answer to two significant figures and include the appropriate units. Part B Calculate the image height. Type a positive value if the image is upright and a negative […]

## Problem 18.33

A 1.0-cm-tall object is 80 cm in front of a converging lens that has a 30 cm focal length. Part A Calculate the image position. Express your answer to two significant figures and include the appropriate units. Part B Calculate the image height. Type a positive value if the image is upright and a negative […]

## Problem 18.30

A 4.0-cm-tall object is 50 cm in front of a converging lens that has a 25 cm focal length. Part A Calculate the image position. Express your answer to two significant figures and include the appropriate units. Part B Calculate the image height. Type a positive value if the image is upright and a negative […]

## Problem 18.23

An object is 15 cm in front of a diverging lens with a focal length of 10 cm. Part A Use ray tracing to determine the location of the image. Express your answer using two significant figures. Part B Is the image upright or inverted? Part C Is the image real or virtual?

## Problem 18.19

A swim mask has a pocket of air between your eyes and the flat glass front. Part A If you look at a fish while swimming underwater with a swim mask on, does the fish appear closer or farther than it really is? Part B Does the fish see your face closer or farther than […]

## Problem 18.17

A biologist keeps a specimen of his favorite beetle embedded in a cube of polystyrene plastic. The hapless bug appears to be 2.0 cm within the plastic. Part A What is the beetle’s actual distance beneath the surface? Express your answer using two significant figures.

## Problem 18.9

An underwater diver sees the sun 54 ∘ above horizontal. Part A How high is the sun above the horizon to a fisherman in a boat above the diver? Express your answer using two significant figures.

## Problem 18.5

The figure shows an object O in front of a plane mirror.(Figure 1) Part A Use ray tracing to determine from which locations A-D the object’s image is visible.

## Problem 18.4

The mirror in the figure deflects a horizontal laser beam by 60∘.(Figure 1) Part A What is the angle ϕ? Express your answer using two significant figures.

## Problem 18.1

A 5.8-ft-tall girl stands on level ground. The sun is 24 ∘ above the horizon. Part A How long is her shadow? Express your answer using two significant figures.