Question

A 2.0-cm-tall candle flame is 2.0 m from a wall. You happen to have a lens with a focal length of 32 cm. How many places can you put the lens to form a well-focused image of the candle flame on the wall? For each location, what are the height and orientation of the image?

Answer #1

A 2.5 cm tall candle flame is 1.7 m from a wall. You happen to
have a lens with a focal length of 31 cm .
For each location, what is the height of the image?

A 7·cm tall candle is placed 175·cm from a lens with a focal
length of +35·cm. Note: enter the absolute value of your
answers for all distances and heights ... use the signs to
determine the type and orientation of the images.
(a) How far from the lens will the image
be? cm.
(b) How tall will the image be? cm
Now, imagine that the candle is moved closer, so that it is only
14·cm from the lens.
(d) How far from...

A 16·cm tall candle is placed 15·cm from a lens with a focal
length of 10·cm. A second identical lens is placed 20·cm past the
first. Note: enter the absolute value of your answers for
all distances and heights ... use the signs to determine the type
and orientation of the images.
(a) How far past the second lens will the final image be? cm
(b) How tall will the final image be? cm
(c) Which of the following describes...

A 1.0 cm tall object is 2.0 cm in front of a converging lens
with a focal length of 3.0 cm.
A. Determine the image position and height by using ray tracing
to find image
B. Calculate the image position and height

A 3 cm. "tall" object is placed 25 cm. from a convex lens with a
focal length of 50 cm. Determine at what distance a focused image
will appear. Determine the height of this image. Create a sketch
(ray diagram) showing the scenario described above labeled as “A”
and a scenario where everything is the same except the focal length
of the lens is changed to 12.5 cm.

A thin lens is used to create a 98-cm-high image of a
2.0-cm-tall slide. The screen used to form this image is 300 cm
from the slide.
a) Draw the ray diagram for this setup.
b) What focal length does the lens need?
c) How far should you place the lens from the slide?

A double convex (converging) lens has a focal length of 36.0 cm.
A 1.40 m tall mule stands 2.0 m from the lens. How tall is the
inverted image of the mule formed by the lens?

A) A 2.0-cmcm-tall object is 16.5 cmcm in front of a diverging
lens that has a -25 cmcm focal length.
1. Calculate the image position.
2. Calculate the image height.
B) A 2.0-cmcm-tall object is 12 cmcm in front of a concave
mirror that has a 25 cmcm focal length.
1. Calculate the image position.
2. Calculate the image height.
C) A slide projector needs to create a 90-cmcm-high image of a
2.0-cmcm-tall slide. The screen is 290 cmcm from...

A 2.00-cm-tall object is located 18.0 cm in front of a
converging lens with a focal length of 30.0 cm. (a) Use the lens
equation and (b) a ray diagram to describe the type, location, and
height of the image that is formed.

A 76 cm tall object is placed 238 mm in front of a diverging
lens with a focal length of magnitude 650 mm.
Find the location of the image. di = mm
Find the magnification of the image. M =
Find the image height. hi = mm

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