Question

5.26* Determine the focal length in air of a thin biconcave lens
having

equal radii of curvature of 12.5 cm and an index of 1.5. What
will

happen to the focal length of this lens we submerge it in carbon
disulfide

(n = 1.628)?

Answer #1

a) Calculate the focal air distance of a thin biconcave lens
(n1 = 1.6) with radii of 20 cm and 20 cm (check the sign
that corresponds to the radii of curvature). Locate and describe
the image of an object to i) 40 cm from the lens, ii) 20 cm from
the lens, iii) 10 cm from the lens, iv) -10 cm from the lens and v)
- 40 cm from the lens. b) A double-convex lens is made of...

An object is placed 50 cm in front of a converging lens having a
focal length of magnitude 30 cm. A double-concave lens that has
equal radii of curvature of 13 cm and an index of refraction 1.64
is placed 40 cm past the first lens.
a) what are the nature and the lateral magnification of the
image?
b) where is the image formed?

A thin plastic lens with index of refraction n = 1.64 has radii
of curvature given by R1 = ?10.0 cm and R2 = 45.0 cm.
(a) Determine the focal length in cm of the lens. cm
(b) Determine whether the lens is converging or diverging.
Determine the image distances in cm for object distances of
infinity, 3.00 cm, and 30.0 cm.
(c) infinity
(d) 3.00 cm
(e) 30.0 cm

The crystalline lens of the human eye is a double-convex lens
made of material having an index of refraction of 1.46. We shall
assume that the radii of curvature of its two surfaces have the
same magnitude. Assume the lens is embedded in a fluid having
refractive index similar to air.
If the radii of curvature of this lens is 7.82mm, what is its
focal length?
If an object 10.0 mm tall is placed 17.0 mm from the eye lens,...

The cornea behaves as a thin lens of focal length approximately
1.80 cm , although this varies a bit. The material of which it is
made has an index of refraction of 1.38, and its front surface is
convex, with a radius of curvature of 5.00 mm .
(Note: The results obtained here are not strictly
accurate, because, on one side, the cornea has a fluid with a
refractive index different from that of air.)
Part A: If this focal...

A converging lens is made using glass with index 1.5. The
desired focal length is 60 cm. If one side of the lens is convex
with radius of curvature 20 cm, how should the other side be
made?

Two converging lenses, each having a focal length equal to 10.7
cm, are separated by 38 cm. An object is 21.4 cm to the left of the
first lens.
(a) Find the position of the final image using both a ray
diagram and the thin-lens equation.
cm to the right of the object
(c) What is the overall lateral magnification?

A converging lens, which has a focal length equal to 8.4 cm, is
separated by 30.5 cm from a second lens. The second lens is a
diverging lens that has a focal length equal to -13.7 cm. An object
is 16.8 cm to the left of the first lens.
(a) Find the position of the final image using both a ray
diagram and the thin-lens equation. __________cm to the right of
the object
(b) Is the final image real or...

An object is placed 100 cm in front of a diverging lens having a
focal length of -25 cm. A converging lens with a focal length of
magnitude 32.5 cm is placed 30 cm past the first lens. What is the
lateral magnification of this system of lenses?

An object is placed 100 cm in front of a diverging lens having a
focal length of -25 cm. A converging lens with a focal length of
magnitude 35.3 cm is placed 30 cm past the first lens. What is the
lateral magnification of this system of lenses?

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