Light rays can change direction when passing from one material into another because the rays move at different speeds in the two materials. More about levers and gears higher tier only content is shown in red where part of a spread is higher it is shown in brackets p1 conservation and dissipation of energy 1. Ray diagrams reflection and refraction of light ccea. Revised glossary for aqa gcse physics student book, author. Light, reflection, and color characteristics of light light is an electromagnetic wave. Light waves all text is lifted from and of chapter of edexcel igcse physics and the accompanying revision guide. Easytounderstand homework and revision materials for your gcse physics single science other 91 studies and exams. Jan 27, 2015 the x rays pass through the healthy tissue, turning the image black and the light regions are where the x rays were absorbed, like your bones or a nasty big tumor. Electromagnetic waves are ultimately produced by an accelerating charge. Light rays can change direction when passing from one material into another because the rays move at different speeds in the two materials notice that the angle of incidence i and the angle of refraction r always lie between the light beam and the normal a material in which light travels slowly is said to be optically dense. Reflection light waves ks3 physics revision bbc bitesize. As shown below, an electromagnetic wave is a transverse wave consisting of mutually perpendicular oscillating electric and magnetic fields. Additional science physics gcse and alevel revision. Concave lens caves inwards causing light rays to spread out diverge.
How light travels light waves ks3 physics revision bbc. Reliable information about the coronavirus covid19 is available from the world health organization current situation, international travel. To help you get even better grades ive written a lot of ebooks, packed full of loads of excellent. There are a variety of diffraction applets available on the internet. The whole of light and the electromagnetic spectrum.
Layer at the back of the eye with light detecting cells and where an image is formed. The cornea provides about twothirds of the power of the eye, owing to the fact that speed of light changes considerably while traveling from air into cornea. Aqa gcse 91 physics student book look inside issuu. In examinations, answers frequently require more than 1 key word for the mark, so aim to include a few key words. Remember the law of reflection, the angle of incidencethe angle of reflection. From explaining sound travels, to the astonishing fact that two light rays can come together and make darkness waves make the most fascinating study. I have isolated some extension level questions from some extended papers paper 3 for cie igcse physics. The rays bend according to the refractive indices provided in table 1. Gcse physics mathematics occams razor book drawing math books brain waves sound waves science nature history following recent breakthroughs, researchers are laying the groundwork for a perfect lens that can resolve subwavelength features in real time, as well as a suite of other optical instruments long thought impossible.
Ultraviolet waves were discovered by johann wilhelm ritter when he looked for other waves outside of the visible region after he had heard about the discovery of infrared waves by herschel. Light rays are reflected off the paper in all directions due to its rough surface. This spectrum includes visible light, xrays and radio waves. What is meant by specula reflection and diffuse reflection. Continue these reflected rays back straight behind the mirror using a dotted line to the point where they appear to come from. Waves gcse gorillaphysics gcse and a level physics revision.
Figure 9 f object converging lens f 5 b i complete figure 9 to show how these two rays form an image. Light travels as transverse waves and faster than sound. You also need to be able to draw reflections in a plane mirror and whatnot. The answers are in the back of the book so you can easily check your work and find out where youre going wrong. Ocr gateway gcse 91 physics student book sample pages. The electromagnetic spectrum the electromagnetic em spectrum. This revision video covers all the main aspects of light needed for igcse physics, reflection, refraction, the thin converging len and the dispersion of light. Real image the light from an object comes together to form an image on a screen. Work because of reflection the light rays are bounced back and forth until they reach the end of the fibre.
Book description the only textbook that fully supports the physics part of the oxford aqa international gcse combined sciences specification 9204, for first teaching from september 2016. All of the light rays bounce off them at the same angle. The wavelength is measured as the distance between two consecutive peaks or two consecutive troughs. The idea is read the information and than print the quiz sheet and try the questions. Describe two differences between xrays and visible light. Physics resources for igcse or gcse students science home revision sheets for igcse or gcse physics.
Find the top 100 most popular items in amazon books best sellers. All text is lifted from and of chapter of edexcel igcse physics and the accompanying revision guide. It covers the major topics for the aqa, edexcel and ocr exams with a range of exercises that test what you know and how well you can apply your knowledge. The image is formed where the rays appear to come from behind. Colour light waves ks3 physics revision bbc bitesize. Oscillations power our cars and cause bridges to collapse. First second third mass earth contact noncontact weight according to newtons law, the bench exerts a force on.
Apr, 2012 you draw light rays as straight lines from the 2 ends of your line, 23 will do. With the help of igcse physics revision book, the students can easily revise what they have learnt about physics from this book and also brush up their formulas and methods of solving the puzzle. Oclcs webjunction has pulled together information and resources to assist library staff as they consider how to handle. Light physics gcse revision buddy science homework. Gcse physics light and electromagnetic waves instructions for each statement, use either the suggested website or your own text book to write a 5point summary. We use waves to see inside the body, and to analyse our universe.
Notice that the angle of incidence i and the angle of refraction r always lie between the light beam and the normal. Aqa gcse physics p14 light kerboodle answers expert. Revised glossary for aqa gcse physics combined science trilogy. Draw in the reflected rays from these incident rays, making sure angle of incidence angle of reflection. On a sheet of white paper draw a pencil line label this ab. Lots of formulas, definitions and key points to learn off. Harpercollinspublishers 2018 physics set b paper 2 07. Revise energy transfers, wave features and diffraction. Convex lens bluges outwards bringing light rays together converge concave lens caves inwards causing light rays to spread out diverge axis a line passing through the middle of the lens real image the light from an object comes together to form an image on a screen virtual image rays diverge to make the object appear to be coming from a completely. If the light rays converge as in a converging lens, then they will converge to a point. Longman physics homework for edexcel igcse page 28. Ocr gateway gcse 91 physics student book sample pages issuu. Relaxed and accommodated vision for distant and close objects. However, formatting rules can vary widely between applications and fields of interest or study.
Instructions z use black ink or black ballpoint pen. Diffuse reflections are from rough surfaces, where the light rays are scattered in all directions. Ultraviolet waves are often called ultraviolet light or ultraviolet. Axis a line passing through the middle of the lens. The students look in a data book and find that the speed of sound in air is given as 341 ms. Electromagnetic waves what are ultraviolet waves ultraviolet waves are part of the electromagnetic spectrum. Waves sound light water see also electromagnetic waves and plate tectonics the best way to remember the information in this chapter is to get a pen and paper and write down your answers before clicking on the answer link which will take you to the correct page. Gcse physics revision science section covering light, radio wave, microwaves. Revised glossary for aqa gcse physics student book by collins. Apr 17, 2014 this revision video covers all the main aspects of light needed for igcse physics, reflection, refraction, the thin converging len and the dispersion of light. How light travels light waves ks3 physics revision. Reflect this off the plane mirror in the centre of your page. Discover the best physics of light in best sellers.
Edexcel igcse physics student book pages 9397, 98 and 126. Edexcel international gcse physics pearson qualifications. Ray diagrams show what happens to light in mirrors and lenses. Aqa gcse 91 physics student book look inside, length. Following closely along with the aqa gcse physics book, this lesson powerpoint covers chapter 14. If an opaque object on the path of light becomes very small, light has a tendency to bend around it and not walk in a straight line an effect known as the diffraction of light. This resource includes 3 whole questions 21 marks total relating to light rays, lenses and properties of mechanical waves etc. This book can be used to support study throughout the course and as a revision aid in the build up to exams. Aqa gcse 91 physics student book look inside, author.
Wave features features of waves gcse physics single science revision bbc bitesize the amplitude is measured as the vertical distance from the xaxis to the top of a peak. The law of reflection of a light at a plane mirror. Gcse physics question paper unit 03 physics june 2017. A lens that is thinner in the middle which spreads out light rays. The ray diagram in figure 2 shows image formation by the cornea and lens of the eye. Using a protractor, draw a normal at c, roughly the middle of ab. Reflection from a plane mirror and a concave mirror. Virtual image rays diverge to make the object appear to be coming from a completely different place. You draw light rays as straight lines from the 2 ends of your line, 23 will do. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Then the straightline treatment of optics using rays fails. A sharp real image an image that can be displayed on a screen is formed. Gcse science physics 91 triple visible light youtube. Its maximum speed is approximately 300,000,000 ms, when it travels through a vacuum.
Using the law of reflection, complete the ray diagram below. Revise their properties and other uses by playing this fun quiz, written specifically for. In both, light rays pass through a small hole and produce a small upside down image. Gcse medical physics revise uses of xray radiation. Name the substance used as a fuel in most nuclear reactors. Year 7 science revision guide physics chauncy school. Light physics gcse revision buddy science homework help ks4. Gcse additional science physics higher tier unit physics p2 friday 16 june 2017 morning time allowed.
A lens also has an imaginary vertical axis that bisects the symmetrical lens into halves. Xrays are a form of electromagnetic radiation studied in gcse physics. Use single slit and laser to show diffraction of light. The very large difference between the speed of light in. Electromagnetic radiation can be useful as well as hazardous. Physics igcse 2012 exam revision notes by samuel lees and adrian guillot 1. This revision guide provides indepth coverage of all the externally assessed course content for gcse aqa physics. There are also accompanying test sheets to check your memorisation.
Light has a direction of travel, it is often useful to indicate this with an arrow on your ray. Written by experienced authors, the enquirybased, international approach ensures a thorough understanding of the underlying principles of physics and. If you want to prevent difficulties that you face while learning the concepts of physics, count on igcsephysics. Then you extend these reflected light rays beyond the plane mirror. Indepth coverage provides everything required for thorough exam preparation detailed explanations and diagrams help consolidate and build on. Gcse physics question paper unit 03 physics june 2016. Numerous and frequentlyupdated resource results are available from this search. Learn about the properties of light waves and how they can be reflected, refracted and dispersed with bbc bitesize ks3 science. Gcse physics light waves speed colour line spectra. The image is formed where the rays appear to come from behind the mirror.
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