Lenses There are two types: Concave Lenses

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.

Lenses. Transparent material is capable of causing parallel rays to either converge or diverge depending upon its shape.

L 31 Light and Optics-3 Images formed by mirrors

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.

Review – for marks! 1) What is the difference between a mirror an a lens? 2) Why do you think we have a lens in our eye instead of a mirror?

The Eye and Sight Contrast ways in which light rays are bend by concave and convex lenses. Describe how a prism forms a visible spectrum Explain why different.

Content Standard 5 – Contrast ways in which light rays are bent by concave and convex lenses.

4/12: Applying the Lens/Mirror Formula  Today we will review problems 9-12 on the Light III calculation WS and then you will prepare for tomorrow’s test.

Physical Attributes and Uses of Lens

Mirrors and Lenses: Mirrors reflect the light Lenses refract the light.

NEXT. S.K.V.D.BL.JANAK PURI G.G.S.S.D.BL.JANAK.PURI NEXT.

Pinhole Cameras Converging & Diverging Lenses. Pinhole Image.

L 33 Light and Optics [3] images formed by mirrors

3.6: Mirrors & Lenses 12/15/14. Part 1: Mirrors A.Light is necessary for eyes to see 1.Light waves spread in all directions from a light. 2.The brain.

Thin Lens Equation Distances of virtual images are negative & distances of real images are positive. Heights are positive if upright (above P.A.) and negative.

Curved Mirrors. Two types of curved mirrors 1. Concave mirrors – inwardly curved inner surface that converges incoming light rays. 2. Convex Mirrors –

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

L 33 Light and Optics [3] images formed by mirrors –plane mirrors –curved mirrors Concave (converging) Convex (diverging) Images formed by lenses the human.

Convex and Concave Lenses.  A concave lens is thicker at the edges than it is at the center.  It spreads light waves apart.

Application of Lenses Lenses in Eyes

Lenses A transparent object used to change the path of light Examples: Human eye Eye glasses Camera Microscope Telescope Reading stones used by monks,

Click to begin music – play as students engage.

Refraction and Lens. Refraction Refraction: the change in direction of a wave as it crosses the boundary b/w 2 media in which a wave travels different.

The Human Eye Comparing human eye to camera Hyperopia, Presbyopia & Myopia.

OBJECTIVE IDENTIFY TYPES OF CORRECTIVE LENSES USED TO CORRECT SIGHT PROBLEMS [COS 5, SAT 10]

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

Refraction and Lenses Light bends--so you can see better!

Lenses June Today  Lenses  Total Internal Reflection  Lab – Exploring Lenses  Next class:  Telescopes, rainbows & review.

Now You See It Marion White and Alex Treser Period 8/9 AP Physics 1.

Lenses Convex Lenses Concave Lenses Eyeglasses Flashlight Camera References.

Lenses. Applications of Light Refraction What are some common applications of the refraction of light? Cameras Microscopes Lenses Eyeglasses Human eye.

Mirrors and Lenses Chapter 14.

The Eye and Sight Describe the relationship between the structure of the eye and sight Contrast ways in which light rays are bent by concave and convex.

You should be able to: Draw ray diagrams for converging and diverging lenses Use the equation 1/u+1/v =1/f for converging lenses Perform.

SEEING THROUGH A LENS.  We see the world through lenses.  Eye glasses = lenses. Contact lenses = lenses.  Magnifying glasses = lenses. Microscopes.

Vision. Normal Vision light is focused directly on the retina - can see clearly both near & far.

Mirrors and Lenses Chapter 23, Section 1. Mirror and Lens Assignment Use p. 668 – 673 in your text Draw the following pictures ◦ Plane mirror ◦ Concave.

Physics 6C Cameras and the Human Eye Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB.

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.

The Eye. The Human Eye The human eye is the optical instrument that helps most of us learn about the external world.

4.6 Lenses - Real Images (p )Lenses (p )

L 33 Light and Optics [3] images formed by mirrors

The Eye and Sight Chapter 12. Vision begins when light rays are reflected off an object and enter the eyes through the cornea, the transparent outer covering.

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

A “Visual” Review Fuss Physical Science.

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.

Human Vision Outcome C4 – Explain how human vision works.

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.

Convex and Concave Lenses

Refraction & Lenses Sections 11.7 and 11.8.

SEEING THROUGH A LENS.  We see the world through lenses.  Eye glasses = lenses. Contact lenses = lenses.  Magnifying glasses = lenses. Microscopes.

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

The Human Eye LG: I can describe the parts and function of the human eye and describe the types of images we observe and the reasons for common vision.

Refraction and Lenses. The most common application of refraction in science and technology is lenses. The kind of lenses we typically think of are made.

Using Lenses. Aims Be able to describe the behavior of light as it passes through a convex lens. Know how to measure the focal length of a convex lens.

The pinhole camera and the simple camera Objectives: You will be able to : Explain why we need a lens in a camera describe the parts we need in a simple.

The Eye and Sight Contrast ways in which light rays are bend by concave and convex lenses. Describe how a prism forms a visible spectrum Explain why different.

The Eye and Sight Contrast ways in which light rays are bend by concave and convex lenses. Describe how a prism forms a visible spectrum Explain why different.

Basic Optical Devices Part 2 Lenses.

Converging lens.

Mirrors, Prisms, Diffraction Gratings and Spectroscopes And Lenses

Lens Cases CONVERGING 2f f f’ 2f’ – object beyond 2f

Presentation transcript:

Lenses There are two types: Concave Lenses Make light rays diverge (get further and further away from one another) Image is larger than the original 2) Biconvex lenses Make light rays converge (get closer and closer together) Image is smaller than the original

The Biconvex Lens In Our Eye The shape of the lens in the eye is called a biconvex lens. This type of lens makes light rays converge (come closer together) and inverts them.

The Biconvex Lens In Our Eye The images we see in our every day lives are inverted by the biconvex lens and projected onto the retina. Thankfully the brain registers these inverted images as if they were right-side up.

Eye Problems & Corrections Myopia Hypermetropia (near-sightedness) (far-sightedness) See Eye Problems Worksheet

Try This! Name 2 types of lenses. Draw out how they function. What is myopia? Hypermetropia? What is the function of lacrimal glands? What is the function of the conjunctiva?