Announcements 11/7/11 Prayer Term project progress reports due Saturday night Slinkies! (Joshua M, Thomas, Mike, Rachael, and Ken—this means you!) Frank.

Slides:

Advertisements

Similar presentations

PHYSICS InClass by SSL Technologies with S. Lancione Exercise-53

Advertisements

Chapter 30 Lenses. Lens – a lens is a transparent material that bends light rays depending on its shape Converging lens – a lens (top left) in which light.

Subject: PHYSICS Topic: Convex lens Light refraction in Prism Ray diagram of a convex lens Ray diagram illustrating graphical construction rules of a.

Image formation by Lenses

Lenses, Mirrors & the Human Eye

Happyphysics.com Physics Lecture Resources Prof. Mineesh Gulati Head-Physics Wing Happy Model Hr. Sec. School, Udhampur, J&K Website: happyphysics.com.

Convex and Concave Lenses

Lab 10: Lenses 1.Focal Length 2.Magnification 3.Lens Equation 4.Depth of Field 5.Spherical Aberrations and Curved Focal Plane 6.Chromatic Aberration 7.Astigmatism.

Characteristics of Lenses Lens  Is a transparent object with at least one curved side that causes light to refract.  Have 2 sides  Either side could.

Chapter 31 Images.

Chapter 23 Mirrors and Lenses Conceptual questions: 4,5,10,14,15,17

1 From Last Time… Lenses and image formation Object Image Lens Object Image Thurs. Sep. 17, 2009Physics 208, Lecture 5.

Pinhole Cameras Converging & Diverging Lenses. Pinhole Image.

and Optical Instruments

Example A 2.0 cm high object is placed 5 cm in front of a +10 cm focal length lens. Where is the object located? Is it real or virtual? Find the height.

Image Formation 2 Thin Lens Multi lens/mirror system

26.6 Lenses. Converging Lens Focal length of a converging lens is real and considered positive.

8. Thin lenses Thin lenses are those whose thickness is small compared to their radius of curvature. They may be either converging or diverging. Example:

Your final homework (#12) is due Friday 25th April. This homework can be collected from my office area in SER 220 from Monday 28 th onwards (for exam revision).

PH 103 Dr. Cecilia Vogel Lecture 7. Review Outline  Lenses  ray diagrams  images  thin lens equation  Lenses  application to camera, eye, and corrective.

Announcements 11/4/11 Prayer Slinkies! HW 28-4 part (d) is canceled Exam update Progress Report due a week from Saturday The three demos from last time.

Announcements 3/14/11 Prayer Exam is being picked up from Testing Center even as we speak, hopefully graded within a couple of days.

Announcements 3/16/11 Prayer Exam 2 being graded, hopefully scores available tomorrow. Term project progress report due Saturday night Still missing slinkies.

1 Focal Point and Images Light from a nearby object passes through a lens forming an image. Which of the following is true? a)The light is in focus at.

Compound lenses --- what’s the purpose? Correct bad optics with additional optics --- Hubble telescope, eyeglasses, etc. Correct or minimize aberations:

Physics 52 - Heat and Optics Dr. Joseph F. Becker Physics Department San Jose State University © 2005 J. F. Becker San Jose State University Physics 52.

Announcements 11/9/11 Prayer Term project progress report due Saturday night a. a.Evidence of progress b. b.Text in body of , who is in your group,

Announcements 11/8/10 Prayer Exam 2 graded: median score 79 (after 2 pt curve) Found PpP book Still missing slinkies from: a. a.Stephen Grant b. b.Ty Beus.

7. Optical instruments 1) Cameras

Textbook sections 27-1 – 27-3 Physics 1161: PreLecture 25 Lenses and your EYE Ciliary Muscles.

Cameras Major components Lens (or combo) Film (or CCD) Aperture Shutter speed.

Today’s agenda: Plane Mirrors. You must be able to draw ray diagrams for plane mirrors, and be able to calculate image and object heights, distances, and.

1© Manhattan Press (H.K.) Ltd. Terms used for lenses Images in lenses Images in lenses 12.2 Converging and diverging lenses Lens formula Lens formula.

A. can be focused on a screen. B. can be projected on a wall.

Notes on Chapter 30 Lenses

Lenses in Combination The analysis of multi-lens systems requires only one new rule: The image of the first lens acts as the object for the second lens.

Ch18.1 Mirrors Concave mirror All light rays that come in parallel to the optical axis, reflect thru the focal point. All light rays that come in thru.

Chapter 14 Light and Reflection

Fundamental of Optical Engineering Lecture 3.  Aberration happens when the rays do not converge to a point where it should be. We may distinguish the.

8. Thin lenses Thin lenses are those whose thickness is small compared to their radius of curvature. They may be either converging or diverging. 1) Types.

Chapter 18-1 Mirrors. Plane Mirror a flat, smooth surface light is reflected by regular reflection rather than by diffuse reflection Light rays are reflected.

Chapter 34 Lecture Eight: Images: II. Image Formed by a Thin Lens A thin lens is one whose thickness is small compared to the radii of curvature For a.

ReflectionReflection and Mirrors The Law of Reflection always applies: “The angle of reflection is equal to the angle of incidence.”

Lesson 25 Lenses Eleanor Roosevelt High School Chin-Sung Lin.

Lenses – Application of Refraction AP Physics B. Lenses – An application of refraction There are 2 basic types of lenses A converging lens (Convex) takes.

1 32 Optical Images image formation reflection & refraction mirror & lens equations Human eye Spherical aberration Chromatic aberration.

SNC2D Chapter 13. Lenses A transparent object used to change the path of light Examples: Human eye Eye glasses Camera Microscope Telescope Reading stones.

Virtual Focal Point Concave Thin Lens Diverging Lens.

Today’s agenda: Death Rays. You must know when to run from Death Rays. Refraction at Spherical Surfaces. You must be able to calculate properties of images.

Ray Diagrams for Lenses. Convex (Converging) Lenses There are two Focal points One in Front and one Behind Focal point is ½ way between Center of Curvature.

Lenses Convex lenses converge rays of light. Parallel rays converge a fixed distance away from the lens. This is known as the focal length.

Mirrors and Lenses. Mirrors and Images Key Question: How does a lens or mirror form an image?

Image Formation. Flat Mirrors  p is called the object distance  q is called the image distance  θ 1 = θ 2 Virtual Image: formed when light rays do.

Lenses Lenses do all the same things mirrors do and use all the same terms and variables. Lenses do all the same things mirrors do and use all the same.

Chapter Reflection and Mirrors. Millions of light rays reflect from objects and enter our eyes – that’s how we see them! When we study the formation of.

Mirrors. Types of mirror There are two types of mirror Plane (flat) Curved Concave (curves in) Convex (curves out)

Textbook sections 27-1 – 27-3 Physics 1161: Lecture 19 Lenses and your EYE Ciliary Muscles.

Refraction & lenses. Types Of Lenses Image Formation via Refraction by thin lenses Thin lenses are those whose thickness is small compared to their radius.

????. Refraction Refraction: Essential Questions What is refraction? What causes refraction? What are some examples of refraction of light that show.

Lenses Converging Lens Diverging Lens F F f f.

Lens Applications & Technologies. airglass airglass.

Thin Lenses.  When light passes through a lens, it refracts twice ◦ Once upon entering the lens and once upon leaving  Exiting ray is parallel to the.

Announcements 11/5/12 Prayer

Refraction at Spherical Surfaces.

Physics 102: Lecture 19 Lenses and your EYE Ciliary Muscles 1.

Lenses This Presentation was used for Year 12 students.

Presentation transcript:

Announcements 11/7/11 Prayer Term project progress reports due Saturday night Slinkies! (Joshua M, Thomas, Mike, Rachael, and Ken—this means you!) Frank & Ernest

Class-designed problem p = _____ Lens 1: f = _____ Distance to Lens 2 = _____ Lens 2: f = _____ q 2 = ? Real or virtual? M tot = ? Upright or inverted? Ray diagram? (for first lens, anyway)

Quick writing Draw the ray diagram for this situation: Converging lens, f = 20 cm, p = 80 cm

Quick writing Draw the ray diagram for this other situation: Converging lens, f = 20 cm, p = 15 cm

Quick writing Draw the ray diagram for this third situation: Diverging lens, f = -20 cm, p = 15 cm

Reading Quiz What’s the term used to refer to rays failing to focus because a lens is shaped incorrectly? a. a.elliptical aberration b. b.hyperbolic aberration c. c.parabolic aberration d. d.spherical aberration

Spherical Aberration Credit: the next several slides were produced by Dr. Durfee

Reducing Spherical Aberration with Aperture

Spherical Aberration

Reducing Spherical Aberration by Reversing Lens

Coma

0 Degree Tilt

10 Degree Tilt

20 Degree Tilt

30 Degree Tilt

40 Degree Tilt

40 Degree Tilt + Aperture

Thought question Red light coming from O produces an image at I. Where will blue light coming from O form an image? a. a.same place b. b.closer to the lens c. c.farther from lens Lens-makers’ eqn: Chromatic Aberration

How does a camera work? Simplest picture What if you leave out the lens? What’s a pinhole camera?

Reading Quiz What is the f-number of a lens? a. a.The focal length in meters b. b.The focal length in inches c. c.One over the focal length in meters d. d.The focal length divided by the diameter of the lens e. e.The focal length divided by 25 cm

Thought question How does the f-number of a lens relate to the half-angle of the “light cone” formed by parallel light entering the lens? a. a. b. b. c. c. d. d. e. e. 

Cameras: f-stops Which has the higher f-number? What’s the advantage of one over the other?

Thought question If you have trouble seeing things far away but can see close objects well, you are “nearsighted”. What kind of lenses do you need in your glasses? a. a.Converging lenses b. b.Diverging lenses

Near point vs. Far point Far point: how far away can you focus on things a. a.Regular person: fp = infinity b. b.Nearsighted person: fp = much smaller – – For me, my fp  1 m (right eye), 0.5 m (left eye) Near point: how close can you see things comfortably a. a.Regular person: np  25 cm b. b.Farsighted person: np = much larger How to fix things with glasses? Farsighted: object at 25 cm  image at –np (converging lens) Nearsighted: object at  cm  image at –fp (diverging lens)