Lenses OALH

Do Now

1

Define refraction.

1

Describe what happens to the velocity of a wave when it moves from a less dense to a more dense medium.

1

Give the rule for the reflected ray from a plane mirror.

1

Define precision.

1

Describe how to convert from MHz to Hz.

1

Draw a diagram to show refraction of water waves when they move from deep water to shallow water.

Describe a convex lens.

1

Describe a concave lens.

1

Describe an image of an object placed more than 2 focal lengths away from a convex lens.

1

Describe an image of an object placed between 1 and 2 focal lengths away from a convex lens.

1

Describe the image produced by a concave lens.

1

Explain the difference between a real image and a virtual image.

1

Describe a convex lens.

1

Describe a concave lens.

1

Describe an image of an object placed more than 2 focal lengths away from a convex lens.

1

Describe an image of an object placed between 1 and 2 focal lengths away from a convex lens.

1

Describe the image produced by a concave lens.

1

Explain the difference between a real image and a virtual image.

Recall Quiz

1

1. Which of the following describes an image placed between 1 and 2 focal lengths away from a convex lens?
A. real and magnified
B. real and diminished
C. virtual and magnified
D. virtual and diminished

1

2. What is the symbol at right for?
A. plane mirror
B. convex lens
C. concave lens
D. parabolic mirror

1

3. Which of the following describes an image placed over 1 focal length away from a concave lens?
A. virtual and inverted
B. real and inverted
C. virtual and the right way up
D. real and the right way up

1

4. A convex lens with a shorter focal length is…
A. taller
B. stronger
C. weaker
D. narrower

I do, we do, you do

1

Draw a ray diagram for the following object.

1

Draw a ray diagram for the following object.

1

Draw a ray diagram for the following object.

1

Describe the image formed in the I do. The image is (real/virtual). The image is (diminished/magnified). The image is (inverted/the right way up).

1

Describe the image formed

1

Describe the image formed

1

Describe the image formed

Plenary

1

1.What is the difference between a real and a virtual image?
2.What is a lens?
3.What are the two types of lens and how are they different from each other?
4.Which type of lens is diverging and which is converging?
5.What do each of these types of lens do to light rays?
6.What is the principal focus/focal point?
7.What is the focal length?

Lenses OALH

Define refraction.

Describe what happens to the velocity of a wave when it moves from a less dense to a more dense medium.

Give the rule for the reflected ray from a plane mirror.

Define precision.

Describe how to convert from MHz to Hz.

Draw a diagram to show refraction of water waves when they move from deep water to shallow water.

Describe a concave lens.

Describe an image of an object placed more than 2 focal lengths away from a convex lens.

Describe an image of an object placed between 1 and 2 focal lengths away from a convex lens.

Describe the image produced by a concave lens.

Explain the difference between a real image and a virtual image.

Describe a convex lens.

Describe a concave lens.

Describe an image of an object placed more than 2 focal lengths away from a convex lens.

Describe an image of an object placed between 1 and 2 focal lengths away from a convex lens.

Describe the image produced by a concave lens.

Explain the difference between a real image and a virtual image.

1. Which of the following describes an image placed between 1 and 2 focal lengths away from a convex lens?A. real and magnifiedB. real and diminishedC. virtual and magnifiedD. virtual and diminished

2. What is the symbol at right for?A. plane mirrorB. convex lensC. concave lensD. parabolic mirror

3. Which of the following describes an image placed over 1 focal length away from a concave lens?A. virtual and invertedB. real and invertedC. virtual and the right way upD. real and the right way up

4. A convex lens with a shorter focal length is…A. tallerB. strongerC. weakerD. narrower

Draw a ray diagram for the following object.

Draw a ray diagram for the following object.

Draw a ray diagram for the following object.

Describe the image formed in the I do. The image is (real/virtual). The image is (diminished/magnified). The image is (inverted/the right way up).

Describe the image formed

Describe the image formed

Describe the image formed

Define refraction.

Describe what happens to the velocity of a wave when it moves from a less dense to a more dense medium.

Give the rule for the reflected ray from a plane mirror.

Define precision.

Describe how to convert from MHz to Hz.

Draw a diagram to show refraction of water waves when they move from deep water to shallow water.

Describe a concave lens.

Describe an image of an object placed more than 2 focal lengths away from a convex lens.

Describe an image of an object placed between 1 and 2 focal lengths away from a convex lens.

Describe the image produced by a concave lens.

Explain the difference between a real image and a virtual image.

Describe a convex lens.

Describe a concave lens.

Describe an image of an object placed more than 2 focal lengths away from a convex lens.

Describe an image of an object placed between 1 and 2 focal lengths away from a convex lens.

Describe the image produced by a concave lens.

Explain the difference between a real image and a virtual image.

1. Which of the following describes an image placed between 1 and 2 focal lengths away from a convex lens?A. real and magnifiedB. real and diminishedC. virtual and magnifiedD. virtual and diminished

2. What is the symbol at right for?A. plane mirrorB. convex lensC. concave lensD. parabolic mirror

3. Which of the following describes an image placed over 1 focal length away from a concave lens?A. virtual and invertedB. real and invertedC. virtual and the right way upD. real and the right way up

4. A convex lens with a shorter focal length is…A. tallerB. strongerC. weakerD. narrower

Draw a ray diagram for the following object.

Draw a ray diagram for the following object.

Draw a ray diagram for the following object.

Describe the image formed in the I do. The image is (real/virtual). The image is (diminished/magnified). The image is (inverted/the right way up).

Describe the image formed

Describe the image formed

Describe the image formed

1. Which of the following describes an image placed between 1 and 2 focal lengths away from a convex lens?
A. real and magnified
B. real and diminished
C. virtual and magnified
D. virtual and diminished

2. What is the symbol at right for?
A. plane mirror
B. convex lens
C. concave lens
D. parabolic mirror

3. Which of the following describes an image placed over 1 focal length away from a concave lens?
A. virtual and inverted
B. real and inverted
C. virtual and the right way up
D. real and the right way up

4. A convex lens with a shorter focal length is…
A. taller
B. stronger
C. weaker
D. narrower

1. Which of the following describes an image placed between 1 and 2 focal lengths away from a convex lens?
A. real and magnified
B. real and diminished
C. virtual and magnified
D. virtual and diminished

2. What is the symbol at right for?
A. plane mirror
B. convex lens
C. concave lens
D. parabolic mirror

3. Which of the following describes an image placed over 1 focal length away from a concave lens?
A. virtual and inverted
B. real and inverted
C. virtual and the right way up
D. real and the right way up

4. A convex lens with a shorter focal length is…
A. taller
B. stronger
C. weaker
D. narrower