What is the height of the robins image correct answer

What is the height of the robin’s image?
keywords:
012 (part 1 of 1) 10 points
Camera lenses are described in terms of their
focal length. A 50 mm lens has a focal length
of 50 mm. A camera is focused on an object
26 m away using a 330 mm lens.
Locate the position of the image.
Solution This is a converging lens, so the
focal length is positive and
d
i
d
o
= f d
i
+ f d
o
d
i
d
o
- f d
i
= f d
o
d
i
( d
o
- f ) = f d
o
d
i
=
f d
o
d
o
- f
014 (part 1 of 1) 10 points
A plane convex lens is made of glass (index
1 . 42) with one flat surface and the other hav-
ing a radius of 24 cm.
What is the focal length of the lens?
Dimensional analysis for d
o
:
m ·
1000 mm
1 m
= mm
keywords:
013 (part 1 of 1) 10 points
The magnification produced by a converging
lens is found to be 2 . 8 for an object placed
21 cm from the lens.
What is the focal length of the lens?
keywords:
014 (part 1 of 1) 10 points
A plane convex lens is made of glass (index
1 . 42) with one flat surface and the other hav-
ing a radius of 24 cm.
What is the focal length of the lens?

Wong, Lemuel – Homework 2 – Due: Feb 2 2007, 11:00 pm – Inst: Matt Mackie 5
Explanation:
Basic Concepts:
keywords:
015 (part 1 of 2) 10 points
A diverging lens has a focal length of 52 cm.
If an object is 33 cm from the lens, what is
the image distance?
016 (part 2 of 2) 10 points
What is the magnitude of the magnification
for this lens?
keywords:
017 (part 1 of 2) 10 points
An object located 33 . 3 cm in front of a lens
forms an image on a screen 11 . 5 cm behind
the lens.
Find the focal length of the lens.

Wong, Lemuel – Homework 2 – Due: Feb 2 2007, 11:00 pm – Inst: Matt Mackie 6
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