Mar 05, 2019 cbse class 12 physics chapter 9 ray optics and optical notes in pdf are available for free download in mycbseguide mobile app. A concave lens ray diagram is very similar to a convex one. This is an example of the motor effect see page 151. Ray optics or geometrical optics in this optics, the light is considered as a ray which travels in a straight line. Ray diagrams help us trace the path of the light for the person to view a point on the image of an object. In the bottom diagram the two force vectors are acting in opposite directions. Now an experienced gcse and a level physics and maths tutor, ashika helps to grow and improve our physics resources. A ray is as a narrow beam of light that tends to travel in a straight line.
Jun 19, 2018 a worksheet to construct ray diagrams to show where images are formed by a converging convex lens and a diverging concave lens. A ray diagram is a representation of the possible paths light can take to get from one place to another. A level physics notes and worked examples to help students with their exams and learning. Check pages 1 50 of a level physics notes in the flip pdf version. Proceure for drawing ray diagram step 1 locate the image. Jul 02, 2019 ray optics and optical instruments class 12 notes chapter 9 1. Use these to help revise for exams and to read through as you go along to build understanding.
Apart from this, cbse class 12 physics notes with derivations also contain colored diagrams to explain any topic in proper way. Define the gravitational field quantitatively as a force per unit mass. It can be deflected by other electric charges or by magnetic fields. Which row in the table gives the peak voltage and the frequency of the signal. A box of mass 500 kg is dragged along a level ground at a speed of 12 ms. Dec 24, 2019 class 12 physics ray optics get here the notes for class 12 physics ray optics. Optical instruments grade 11 physics notes khullakitab. It also helps us trace the direction in which the light travels. This is possible only when you have the best cbse class 12 physics study material and a smart preparation plan. Page 5 the x ray spectrum for electrons with energy e, the maximum x ray photon energy is e. Aqa alevel physics is a linear subject, so youll be taking all of your exams at. This guide is not intended as a set of teaching notes. Gcseigcse physics solutions, examples, worksheets, videos.
Cbse notes class 12 physics ray optics aglasem schools. We now show that f r2, where r is the radius of curvatur e of the mirr or. A skew ray is a ray that travels in a nonplanar zigzag path and never crosses the axis of an optical fiber. After learning about the structure of optical telescopes we moove on to look at radio telescopes and other methods of viewing the cosmos. Ray diagrams can be drawn for all types of mirrors. If two plane mirrors are inclined to each other at 90o, the emergent ray is anti. Check out the physics files page for powerpoint notes from class. Pdf ordinary level physics lecturers notes 1 st edition peter. A ray of light is approaching a set of three mirrors as shown in the diagram. Detailed notes section 10 medical physics aqa physics alevel. A guided ray, bound ray, or trapped ray is a ray in a multimode optical fiber, which is confined by the core. Physics notes kcse form 4 topics form 4 physics syllabus.
Forming a real image the location and nature of the image can be found by drawing a ray diagram. An example of a ray is the beam of light from a laser or laser pointer. Spectrum will have a combination of bohr discrete energies and bremsstrahlung radiation. Draw a ray from the object to the lens that is parallel to the principal axis. Lenses ray diagram construction worksheet teaching. In optics a ray is an idealized model of light, obtained by choosing a line that is perpendicular to the wavefronts of the actual light, and that points in the direction of energy flow. The contrast the optical arrangement of human eye and those of a photographic camera, including. Ncert solutions for class 12 physics chapter 9 pdf form.
In this diagram, the magnetic field is at right angles to the electron beam so the beam is deflected. A meridional ray is a ray that passes through the axis of an optical fiber. Thin converging lens cie igcse physics revision notes. Cbse class 12 physics notes all chapters with derivations. Virtual images convex lenses consider the situation in which the object distance is less than the focal length of a converging convex lens. Ashika graduated with a firstclass physics degree from manchester university and, having worked as a software engineer, focused on physics education, creating engaging content to help students across all levels. Gce o level physics notes mini physics learn physics. That is, they bring parallel rays of light to a focus, producing a real image. The reflex action is controlled by two groups of muscle. An interesting consequence of this is that a light ray will change direction when passing from one medium to another. It provides more detail on specification topics that teachers may not be familiar with and should be used alongside the specification.
Receptors are groups of specialised cells that can generate an electrical impulse in a sensory neurone. Ray diagram to show the image formation in normal adjustment. With the help of ray diagram explain the phenomenon of total internal reflection. Ray diagram uses lines with arrows to represent the incident ray and the reflected ray. International as and a level physics revision guide gce guide. Here are some useful rays in determining the nature of the images formed by converging and diverging lens. Ray optics and optical instruments class 12 notes chapter. In this section from notes of the chapter ray optics class 12, the rectilinear propagation of light theory has been explained thoroughly with the help of a diagram of a ray of light. If the force of friction between the box and floor is 1200 n. However, with the right study plan, revision content structure, and notes youll. Explain with ray diagrams the formation of an image using spherical mirrors. This guide is not a comprehensive set of teaching notes. In dim light, the pupil dilates widens in order to allow as much light into the eye.
A full set of a level physics notes free to download. Since lenses pass light through them unlike mirrors it is useful to draw a focal point on each side of the lens for ray tracing. You need to know how to draw ray diagrams for objects at different distances from a lens. Single slit diffraction the reason for the fringes is the same as with double slit diffraction except now the reason for the interference is that the distance from one side of the single slit to any point on the screen is different to the distance from the other side of the slit.
The geometry of reflection of an incident ray is shown in fig. Written by teachers for teachers and students, the physics classroom provides a wealth of resources that meets the varied needs of both students and teachers. A level medical physics x rays the x ray tube youtube. Feedback greatly received particularly constructive ways to improve. Use as many wavelengths shown on the screen as possible to reduce uncertainties. Reflection reflection is the phenomenon of changing the path of. Ray optics and optical instruments class 12 notes chapter 9. When drawing a ray diagram in an examination, students should. Use ray 1 and ray 2 rules to make a principal ray diagram showing that an object at infinite distance will create an image at the focal point.
Lenses ray diagram construction worksheet teaching resources. Physics 312 the distance between the focus f and the pole p of the mirror is called the focal length of the mirror, denoted by f. Physics notes for class 12 chapter 9 ray optics and optical. Ray 2 heads towards f before refracting parallel to the axis. Because of colored diagrams students become able to understand the concept and logic to explain any topics of physics. The cathode ray tube or crt is a vacuum tube of special geometrical shape which converts an electrical signal into a visual one. To understand ray diagrams it is important to know something about images. Physics notes for class 12 chapter 9 ray optics and. Ray a emerges into the air along the tangent of the optical fibre at point q.
Answers of assignment are given at the end of each assignment with complete solutions. X q a explain why there is no change in the direction of light when ray a. Ray optics and optical class 12 notes physics mycbseguide. The ray is guided if 8 ray is identified by its plane of incidence, a plane parallel to the fiber axis and passing through the ray, and by the angle with that axis, as illustrated in fig. This diagram shows that, as the lens is made thinner, the path of the ray through the centre of the lens is deviated less. The timebase is set at 5 msdiv and the ygain is set at 10 vdiv. Diagram of cathode ray oscilloscope display showing wavelength and timebase setting. Rules for drawing ray diagram in concave and convex mirror. Photometry is a branch measurement of light energy. Lens are used in making spectacles, cameras, cinema projectors, microscopes and telescopes. The best app for cbse students now provides ray optics and optical class 12 notes latest chapter wise notes for quick preparation of cbse board exams and schoolbased annual examinations. A ray parallel to the lens axis passes through the far focus of a converging lens or appears to come from the near focus of a diverging lens. Obtain the relation between critical angle and refractive indices of two media.
In the ray model of light, a ray travels in a straight line until it hits something, like a mirror, or an interface between two different materials. Physics igcse 2012 exam revision notes by samuel lees and adrian guillot 1. Draw ray diagram to show how right angled isosceles prism can be used to. An incident ray passing through the focal point on the objective side of the lens will emerge parallel to the principal axis. The nature of the atom and even the tiny nucleus will be explored. Since the light ray appears to be broken, the phenomenon is known as refraction. Ray 3 passes straight through the center of the lens. A lens is conventionally defined as a piece of glass which is used to focus or change the direction of a beam of light passing through it they are mainly made of glass or plastic. The period of the wave can be determined from the timebase this is how many seconds each division represents measured commonly in s div1 or s cm1.
Ray optics and optical instruments class 12 notes pdf download. This is a reflex action carried out to protect the retina from damage in bright light and protect us from not seeing objects in dim light. The r eflected ray is parallel to the principal axis. Thus, a ray can be interpreted as starting from the point p, and traveling in the direction of a. A diaphragm to control the amount of light that gets through to the lens. Deviation produced by a plane mirror and by two inclined plane mirrors. Candidates who are ambitious to qualify the class 12 with good score can check this article for notes. Sound waves in air are created by making a surface vibrate so it sends compression waves through the surrounding air. Physics notes form 4 free download kcse revision notes pdf. Jan 19, 2020 the notes available here are great for revision and studying on the go. Concave mirrors and convex mirrors image formation, ray diagram.
Class 12 physics revision notes for chapter 9 ray optics. Notes, solutions, examples for gcse and igcse physics, energy, electricity, atomic structure and radioactivity, particle model of matter, forces, waves, magnetism. The incident ray, normal and reflected ray all lie in the same plane. Apr 23, 2020 there are some rules which we use to obtain images in a ray diagramlets look at themrule 1 ray parallel to principal axis will pass through focus after reflectionfor aconcave mirror,we see that ray passes through focus after reflectionfor aconvex mirror,since focus is on the right side,itappearst. Define the gravitational field qualitatively as the region of space around a mass where another point mass experiences a force. A video lesson on the basic workings of the x ray tube. A level physics notes to support my lessons at lcs. Rays are used to model the propagation of light through an optical system, by dividing the real light field up into discrete rays that can be computationally propagated through the system by the techniques of. Physics notes for class 12 chapter 9 ray optics and optical instruments light light is a form of energy eyes.
Optical fibres the refractive index of the glass fibre the core must be higher than that of the plastic coating the cladding for total internal reflection to occur this type of optical fibre is called a stepindex fibre because the refractive index increases in a step from the air on the outside, to the much higher value of the cladding, to the even higher value of the core. This is useful in ray diagrams because the path of this ray can be drawn as a straight line when the lens is thin. Ray optics and optical instruments class 12 notes pdf download laws of reflection. If this is too basic for you, you can read up on a level physics equivalent to advanced placement most of the topics have multiplechoice questions mcqs quiz. The eye is a sense organ containing receptors sensitive to light intensity and colour. X q a explain why there is no change in the direction of light when ray a enters the optical fibre.
Waves that pass through a substance are vibrations which pass through that substance. It is important to be able to draw ray diagrams to show the refraction of a wave at a boundary. Cathoderay oscilloscope cie a level physics revision notes. With a converging lens, paraxial rays that are parallel to the principal axis converge to the focal point, f. Two rays, a and b, are incident on surface xy of the fibre. In the top diagram both of the force vectors are acting in the same direction so we can simply add them together. This is the shutter in a camera, and the pupil, at the center of the iris, in the human eye. Although, may also be useful for other boardsalevel. A level physics notes pages 1 50 flip pdf download fliphtml5. A ray of light can undergo both reflection and refraction. Image formation by convex and concave lens ray diagrams.
You need to know how to draw ray diagrams for objects at different distances from a. General physics ii course lecture notes section xii. This section from chapter 9 class 12 physics notes will help students to revise their understanding regarding the reflection of light. Use graph paper and a ruler to make an accurate ray diagram. A crt makes available a large number of electrons which are accelerated to high velocity and are brought to focus on a fluorescent screen where it produces a spot when strikes it. The o level physics content here is equivalent to the physics required to obtain american high school diploma. An image is formed at a point where the light rays from an object appear to come from, had their direction not. Complete a level physics notes cambridge international as and a level physics builds on the skills acquired at cambridge igcse or equivalent level. The diagram shows the trace on an oscilloscope when an alternating voltage is applied to its input. If the parallel rays entering the lens are nonaxial, they will be brought to a focus in the focal plane.
All four types of convex lens are converging lenses. A plane wavefront dashed line approaches the interface. Physics notes form 1 to 4 physics form 4, 3, 2, 1 notes. Sqa h physics 2008 q10 d example 2 calculate the frequency of the output signal from the signal. They are written for the aqa exam board but should still be useful for all other exam boards, including edexcel, and ocr a and b. This is often from a source or object to an observer or. This is the shutter in a camera, and the pupil, at. It states that for each and every object, there is an image. The physics classroom serves students, teachers and classrooms by providing classroomready resources that utilize an easytounderstand language that makes learning interactive and multidimensional. Revision for aqa physics gcse, including summary notes, exam questions by topic and videos for each module. Concave mirrors and convex mirrors image formation, ray. The syllabus includes the main theoretical concepts which are fundamental to the subject, a section on some current applications of physics, and a strong emphasis on advanced practical skills.
Electricity detailed contents alevel physics tutor. The focal length, f, is the distance between f and the lens. Light gce study buddy the best o level revision resource. A level physics notes download a full set of free revision. Characteristics of light light waves are electromagnetic waves, whose nature is transverse.
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