Question

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?

Answer #1

A slide projector needs to create a 90-cm-high image of a
2.0-cm-tall slide. The screen is 250 cm from the slide.
What focal length does the lens need? Note the sign convention
and indicate + or –
How far should you place the lens from the slide?

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...

The projection lens in a certain slide projector is a single
thin lens. A slide 24.4 mm high is to be projected so that its
image fills a screen 1.88 m high. The slide-to-screen distance is
2.90 m. (Enter your answers to at least one decimal place.)
(a) Determine the focal length of the projection lens (mm)
(b) How far from the slide should the lens of the projector be
placed to form the image on the screen (mm)?

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

In a projector, an object (an image on an LCD screen) is 5.1 cm
from a lens with focal length 5 cm. Draw the ray diagram for this
situation and calculate the distance to the image. What is the
magnification? Is the image real or virtual?

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 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?

A 2.0 cm tall object is 25.0 cm in front of a concave mirror
that has a 10.0 cm focal length. (a) Draw a ray diagram showing the
object and image position. (b) Where is the image located? (16.6
cm) (c) What is the height of the image? (-1.32 cm) (d) What are
the characteristics of the image?

You wish to project the image of a slide on a screen 9.50 m from
the lens of a slide projector.
1) if the slide is palced 13 cm from the lens what focal length
lens is required
2) if the dimensions of the picture on a 35-mm color slide are
24mmx36mm what is the minimum size of the projector screen required
to accommodate the image?

A converging lens with a focal length of 12 cm forms a real
image of 8 mm tall, 17 cm to the right of the lens. (a) Determine
the position and size of the object (b) Is the image upright or
inverted? (c) Are the object and image on the same side or opposite
sides of the object? (d) Draw a ray-diagram for this situation

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