Problem 26.79 An object with a height of 2.65cm is placed 38.0mm to the left of

Question

Problem 26.79

An object with a height of 2.65cm is placed 38.0mm to the left of a lens with a focal length of 36.2mm .

Part A

Where is the image located?
Part B

Where is the image located?
The image is located to the right of the lens.
The image is located to the left of the lens.
Part C

What is the height of the image?

Problem 26.80

A lens for a 35-mm camera has a focal length given by f = 41mm .
Part A

How close to the film should the lens be placed to form a sharp image of an object that is 4.0m away?

Express your answer using two significant figures.
Part B

What is the magnification of the image on the film?

Express your answer using two significant figures.
m =

Explanation / Answer

26.79)

A)

f=36.2 mm,

u=38 mm

now by using lens equation,

1/u+1/v=1/f

1/38+1/v=1/36.2

======>

v=(38*36.2)/(38-36.2)

=764.22 mm

B)

the image is located to the left of the lens

c)

m=v/u=h'/h

=764.22/38

h'/h=20.11

h'=20.11*h

=20.11*2.65

h=53.29 cm

26.8)

A)

1/u+1/v=1/f

1/4+1/v=1/0.041

=====>

v=0.0414 m

v=4.14 cm .....

B)

m=v/u

=0.0414/4

=0.01

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