Embed Size (px)
Citation preview
Hello CHS Physics 12 students,
There are several options for turning in your work: Use a google doc, or share an email, or screen shot
your work on an ipad or photo on phone and share it with me at [email protected] .
I will send out information on Remind or you can check school wires. Also check your school email from
time to time. To have continuity of learning here is a brief overview of the next 2 weeks
4/16 Refraction pages 189 – 190 attached
4/17 Refraction pages 191 – 193 attached
4/20 Test on refraction
4/21 Worksheet physics classroom “lenses” p 9 and 10
4/22 Worksheet “ray diagrams converging lens”physics classroom p 11-12
4/23 Worksheet “ray diagrams diverging lens”physics classroom p 11-13
4/24 Worksheet “lens practice” p 15 and 16
4/27 Draw ray diagrams for lenses” attached
4/28 Do worksheet “answer the following about lenses” and lens equation worksheet problems 1-6
4/29 Do lens group quiz
4/30 Test on lens
Stay Safe!
Mr. Grice
Ray Diagrams
1.parallel to principal axis →through(converging ) or away (diverging) from focal point
2. through focal pt (converging) or toward focal point (diverging) → parallel to principal axis
3. from c (or 2f) and straight through the lens
1. Converging Lens Case 1: Using a ray diagram, draw the image of an object located at an infinite
distance away from a converging lens.
a. Is the image smaller, larger or the
same size as the object?
b. What type of image is produced?
c. Give an example of this lens use:
2. Converging Lens Case 2:Using a ray diagram, draw the image of a candle placed at a point outside of
the 2F location (two times the focus distance) of a converging lens.
a. Is the image smaller, larger or the
same size as the object?
b. What type of image is produced?
c. Is the object inverted or erect?
d. Give an example of this lens use:
3. Converging Lens Case 3:Using a ray diagram, draw the image of a candle placed at the 2F location of
a converging lens.
a. Is the image smaller, larger or the
same size as the object?
b. What type of image is produced?
c. Is the object inverted or erect?
F 2 F F 2 F
F 2 F F 2 F
F 2 F F 2 F
4. Converging Lens Case 4:Using a ray diagram, draw the image of a candle placed between the focus
and the 2F location of a converging lens.
a. Is the image smaller, larger or the
same size as the object?
b. What type of image is produced?
c. Is the object inverted or erect?
d. Give an example of this lens use:
5. Converging Lens Case 5:Using a ray diagram, draw the image of a candle placed at the focus of a
converging lens.
a. Is the image smaller, larger or the
same size as the object?
b. What type of image is produced?
c. Is the object inverted or erect?
d. Give an example of this lens use:
6. Converging Lens Case 6:Using a ray diagram, draw the image of a candle placed inside of the focus
of a converging lens.
a. Is the image smaller, larger or the
same size as the object?
b. What type of image is produced?
c. Is the object inverted or erect?
7. Diverging Lens: Using a ray diagram, draw the image of a candle placed inside of the focus of a
diverging lens.
a. Is the image smaller, larger or the same size as the object?
b. What type of image is produced? c. Is the object inverted or erect?
F 2 F F 2 F
F 2 F F 2 F
F 2 F F 2 F
F 2 F F 2 F
Answer the following:
1. If f = + what type of lens is it?
2. If f = - what type of lens is it?
3. If di = + what side is image on (same side or opposite)?
4. If di = - what side is image on (same side or opposite)?
5. If di = + what type of image is it?
6. If di = - what type of image is it?
7. If hi = + what type of image is it?
8. If hi = - what type of image is it?
9. If M = 1. 7 is this a smaller, larger, or same size image? Is it real or virtual?
10. If M = -1 is this a smaller, larger, or same size image? Is it real or virtual?
11. If M = -.5 is this a smaller, larger, or same size image? Is it real or virtual?
12. If M = .7 is this a smaller, larger, or same size image? Is it real or virtual?
13. If M = -2 is this a smaller, larger, or same size image? Is it real or virtual?
14. If M = -5.2 is this a smaller, larger, or same size image? Is it real or virtual?
Lens Equation Worksheet
1/do + 1/di = 1/f
M = hi / ho = -di / do
do→distance from object to lens
di→distance from image to lens
f→focal length
hi →image height
ho →object height
M→ magnification
1. An object is placed 30.00cm in front of a lens that has a focal length of
10.00cm.
a. What is the image distance?
b. What is the magnification of the lens?
c. If the object was 4.00cm tall, what is the image height?
d. Describe the image.
2. An object is 15.00cm in front of a lens and produces an image that is
20.00cm behind the lens.
a. What is the magnification of the lens?
b. What is the focal length of the lens?
c. If the object is 9.00cm tall, what is the image height?
d. Describe the image
Positive (+) Negative (-)
do Object in front of the
lens
Object in back of the
lens
di Image in back of the lens Image in front of the
lens
F Converging lens
(convex)
Diverging lens
(concave)
M Erect Inverted
3. A lens with a magnification of 0.37 produces an image –6.30cm away
from the lens if the object is 12.50cm tall.
a. What is the height of the image?
b. What is the object distance?
c. What is the focal length of the lens?
d. Describe the image?
4. An object is 6.00cm tall and is 3.00cm away from a lens with a focal
length of 6.00cm.
a. What is the image distance?
b. What is the image height?
c. What is the magnification of the lens?
d. Describe the image?
5. An object is 26.00cm away from a lens with a magnification of –1.00
produces an image that is –11.00cm tall.
a. What is the object height?
b. What is image distance?
c. What is the focal length?
d. Describe the image?
6. An image is –32.60cm away and has a height of 24.50cm when viewed
through a lens with a focal length of 19.00cm.
a. What is the objects distance?
b. What is the objects height?
c. What is the magnification?
d. Describe the image?
Lens group quiz Name:
1/di + 1/do = 1/f
M = hi/ho = -di/do
Label a→e on the ray diagram.
Then use a ruler to complete a-e.
Finally, answer f , g, and h.
a. Measured from tip of waxed part of
candle (not including wick) ho=
b. Measured from tip of waxed part of
candle (not including wick) hi=
c. do=
d. di=
e. f =
f. M=
g. Draw the third ray that can be drawn
according to the rules for a ray
diagram
h. What is an application for a lens of
this type and configuration
F 2F F 2F
