Lab 29 PHYS

#9 Thin Lenses: Hybrid Lenses Which of the following lenses has the capacity to produce a real inverted image? O A. A double concave lens O B. A plano concave lens O C. A plano convex lens O D. A double concave lens

+ Understanding Lenses Learning Goal: To learn the quantitative use of the lens equation, as well as how to determine qualitative properties of solutions. In working with lenses, there are three important quantities to consider. The object distance 8 is the distance along the axis of the lens to the object. The image distance s' is the distance along the axis of the lens to the image. The focal length f is an intrinsic property of the lens. These three quantities are related through the equation = + === Note that this equation is valid only for thin, spherical lenses. Unless otherwise specified, a lens problem always assumes that you are using thin, spherical lenses. The equation above allows you to calculate the locations of images and objects. Frequently, you will also be interested in the size of the image or object, particularly if you are considering a magnifying glass or microscope. The ratio of the size of an image to the size of the object is called the magnification. It is…

0: Images Еyes Acuvity Our eyes use a biconvex lens behind our pupil to focus incoming light into images on the retina at the back of our eyes. Human eyes have a diameter of approximately 2.5 cm on average. Imagine a 1.8 m tall person stands 2 m away from you. 1.8 m 2.0 m 0.025m *Image not drawn to scale 18 Draw a ray diagram showing how the light coming from this person passes through the lens in your eye and produces an image on your retina.

Physics v Q4 The power of a convex lens of focal length 5 cm is +20D +50D -20 D -50 D. Physics

Q2.The lens is the transparent optical device that affects the focus of a light beam through refraction. Choose one type of the lens and give one application in our everyday lives and explain it (Minimum five lines).

2  Why was it hard to see your reflection after you crumpled up an aluminum foil?*       Only some intensity of the light is reflected, thus making it hard to see ourselves.       The ray of light will bounce back along the incident ray therefore no image will be formed.       The reflected ray of the light will be different from the angle of incidence.       The light is reflected in varying directions, making it hard for us to see ourselves.

Optics A diagram of a hyperbolic mirror is shown. The property of a hyperbolic mirror is that if you shine a beam of light from the mirror, the light is reflected toward the focal point. For this mirror, where should you place a view lens to see the converging light? Asymptote: y = Reflected light 2 6. 8. -2 -4 co

Name Chapter 30 Lenses Percent Transmission of Light 100% of the light that strikes it through the lens. Consider the two lenses No glass lens is perfectly transparent, that is, the lens does not transmit in a telescope, the objective lens and the eyepiece lens. If the objective lens transmits 96% of the light, and the eyepiece lens transmits 97%, what percent of light from a distant source reaches your eye? 1. Read and Understand What information are you given? Transmission of objective lens = 96% Transmission of eyepiece lens = 97% 2. Plan and Solve What unknown are you trying to calculate? Percent of light transmitted through two-lens system = ? What formula contains the given quantity and the unknown? Transmitted light = Incident light x Percent transmission Substitute the known values and solve. For light passing through two lenses, multiply the incident light by the percent transmission of each lens. Assume the amount of incident is unity, or 1. Transmitted light = Incident light…

Which of the following can produce virtual images? 1. Concave lenses 2. Convex lenses 3. Concave mirror 4. Convex mirror 5. Plane mirror Select the correct option from codes given below: [A] 1, 3 & 5 Only [B] 2, 3 & 5 Only [C] 1, 2, 3 & 4 Only [D] 1, 2, 3, 4 & 5

Physics104 lab: Spherical Mirrors(concave, convex) ***VERY IMPORTANT NOTE Please answer this question in a very sensible manner by explaining your idea in a figurative and descriptive way. Plz, don't copy the answer from Chegg or any other as those answer doesn’t make any sense.   Q) Describe the behaviour of the reflected beam when it is aimed near the edges of the mirror. What do you think causes this?

Part 3 - Keplerian Telescope A telescope magnifies far-off images. Rays hitting the objective are almost parallel and are focused to form an inverted, real image at the focal point of the eyepiece. The eyepiece refracts the light so the rays leave the eyepiece again almost parallel. The object remains inverted, and so the angular magnification is defined as M= -B/a, where the angles are shown in Figure 2. objective eyepiece f. f. f. F e F. h inverted image at infinity Figure 2: A Keplerian telescope, invented by Johannes Kepler in 1611, uses two converging lenses as shown. An objective with focal length fo and an eyepiece with focal length fe focus nearly parallel light rays from a distant object into an inverted image of much smaller size than the object. 1. Assume that a and ß are small angles (much less than 1 radian). Using the ray diagram shown in Figure 2 and considering two appropriate triangles, show that M = -fo/ fe.

1. Where around a convex lens should you place an object so that the image of the object forms at the focal point on the other side of the lens? A. At the focal point of the lens B. Infinitely far away C. Twice as far from the lens as the focal point D. Somewhere between f and 2f   2. An acrylic lens (n = 1.5) is able to produce a real image that is 10 cm from the lens. The lens is then replaced with an identically shaped diamond lens (n = 2.4). What happens to the image distance of the image produced by the new lens?   A. It is greater than 10 cm B. It is less that 10 cm C. It is 10 cm D. It depends on object distance

mirror/ If a concave mirror/convex concave lens/convex lens has a radius of 4 cm and the height of the object is 1 cm and the distance of the object is 1 cm, 2 cm, 3 cm, 4 cm and 5 cm from the optical center point then specify: a. Draw a picture of the shadow formation process and the nature of the resulting shadow! b. Shadow distance and image height (The calculation results must be close to / equal to the results of measurements using a ruler)

You are trying to photograph a bird sitting on a tree branch, but a tall hedge is blocking your view. However, as the drawing shows, a plane mirror reflects light from the bird into your camera. For what distance must you set the focus of the camera lens in order to snap a sharp picture of the bird's image? Number i Units 4.3 m -2.1 mi 3.7 m-

#8 Thin Lenses: Basic Aspects In the case of a real object, a concave (diverging) lens always produces a: O A. A magnified upright virtual image O B. A smaller upright virtual image O C. A magnified inverted real image O D. A smaller inverted real image

Physics Question #1 Ch.3 is the attached image

Geometrical optics. Optical systems 1. Thin lens equation Consider a lens having an index of refraction n and two spherical surfaces with radii of curvature R1 and R2, as in Figure. An object is placed at point O at a distance p in front of surface. The focal length f of a thin lens is the image distance that corresponds to an infinite object distance R1 R C2 p'a f – lens focal length (m); p – distance from the object to the lens or object distance (m); q – distance from the image to the lens or image distance (m). Sign Conventions for Thin Lenses p is positive if object is in front of lens (real object). p is negative if object is in back of lens (virtual object). q is positive if image is in back of lens (real image). q is negative if image is in front of lens (virtual image). f is positive if the lens is converging. fis negative if the lens is diverging. OC(ICI (a) 2. Magnification of Images The lateral magnification of the lens is defined as the ratio of the image height H to the…

2. The refraction of light between air and glass is the basis of the corrective lenses. The surface of the glass can be curved more or less to bring rays of light into focus at any distance from the lens. So, a lens can be thought of as a piece of a glass sphere with a certain radius as shown in figure 1 below. The bigger the radius, the less curved the lens is. In figure 2, I've zoomed in on the lens. I've drawn two parallel light rays entering the lens from the upper and lower half. If the incident angle of the light rays is 5°, at what distance from the back side of the lens will the light rays come into focus (answering in millimeters will likely be most convenient). Remember that refraction will occur when the light passes from the air to the glass, then again when it passes from the glass to the air. The indices of refraction of air and glass are 1 and 1.52, respectively. Lens R Figure 1 Di x = 4mm Tar h = 2mm; Figure 2 d=?

You unconsciously estimate the distance to an object from the angle it subtends in your field of view. This angle in radians is related to the linear height of the object h and to the distance d by 0= h/d. Assume that you are driving a car and that another car, 1.50 m high, is 21.0 m behind you. 870 & ❀ ६ OBJECTS IN MIRROR ARE CLOSER THAN THEY APPEAR The Far Side by Gary Larson 1985 FarWorks, Inc. All Rights Reserved. Used with permission. (a) Suppose your car has a flat passenger-side rearview mirror, 1.55 m from your eyes. How far from your eyes is the image of the car following you? m (b) What angle does the image subtend in your field of view? rad (c) Suppose instead your car has a convex rearview mirror (see figures) with a radius of curvature of magnitude 1.80 m. How far from your eyes is the image of the car following you? m (d) What angle does the image subtend at your eyes? rad (e) Based on its angular size, how far away does the following car appear to be? m

a.) Draw a simple version of the human eye looking at the sun (never look at the sun yourself!), showing the lens and the retina. Label s, s’, and f.     b.) If the distance between the lens and the retina is around 2 cm, relabel s, s’, and f with their exact distances.     c.) Why do we need a lens in the eye to view distant objects?

Application For a camera with a lens of fixed focal length F focus on an object located at a distance x from the lens, the film must be placed at a distance y behind the lens, where F, x, and y are related by 1 + 1 y F Suppose the camera has a 55-mm lens (F=55). A. Express y as a function of x and graph the function. B. What happens to the focusing distance y as the object moves far away from the lens? C. What happens to the focusing distance y as the object moves closer to the lens?

3. Complete the following table: OBJECT DISTANCE (s) ∞o>s>2f s = 2f 2f>s>f s = f s< f Table 1. Thin Lenses IMAGE LOCATION, ORIENTATION AND RELATIVE SIZE CONVEX LENS CONCAVE LENS

If a concave mirror/convex mirror/concave lens/convex lens has a radius of 4 cm and the height of the object is 1 cm and the distance of the object is 1 cm, 2 cm, 3 cm, 4 cm and 5 cm from the optical center point then specify: a. Draw a picture of the shadow formation process and the nature of the resulting shadow! pictures in detail, will be given upvote 2 as soon as possible b. Shadow distance and image height (The calculation results must be close to / equal to the results of measurements using a ruler) I need a complete answer thank you

OPAC 101 Introduction to Optics, Bütünleme Exam Questions 3. You have a concave mirror of whose radius of curvature is |R| = 150 cm and aperture diameter is D = 20 cm. Locate, describe and draw the image for the object distance of 90 cm.

Physics v Q3 Light falls obliquely on the surface of a thick glass slab. Which statement among the following is correct? Light stops at the surface. Light reflects at the surface but does not refract. Light refracts at the surface but does not reflect. A part of the light reflects at the surface, and a part of it refracts.

Often people with lens-to-retina distances smaller than 2 cm purchase glasses to place in front of their eyes.  a. Explain why people with lens-to-retina distances smaller than 2 cm need glasses.  b. Explain whether the glasses should be composed of converging or diverging lenses.  c. Draw a ray diagram demonstrating the ability to see with and without the glasses.