OPTI 201R, Fall 2005
Problem Set V
Due September 26, 2005
09/19/05
1 of 2
V. 1
What is the power of an equiconvex thin lens with
1
R
=
2
R
= +25, with an index of
1.5?
V. 2
A negative thin lens of 5 diopters (-) has an object placed 40 cm in front of it.
a) What is the transverse magnification?
b)
Is the image real or virtual?
V. 3
A thin lens requires that the first radius (R
1
) be twice the value of the second radius
(R
2
).
If the required power is -10 diopters for an n=15, what is the value of the two
radii?
V. 4
An equal, concave, thin lens (t = 0) has surfaces with a radius of 11 cm.
R
1
= R
2
= 11cm
a)
What is its power?
b)
What is the value of the front and back focal length (f and f*)?
c)
Make a sketch and locate the f, f*.
V. 5
A negative lens has a back focal length of –100 mm and a diameter of 20 mm.
a)
Where is the image of a 5 mm object placed in front of the lens at 100

This ** preview** has intentionally

**sections.**

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

*Sign up*